./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8 --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 11ea6a807ddcb2daf8bb5097d2ce4398be45faeef70324f1726e469d3d120ac8 --- 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-2329fc7 [2022-12-13 12:33:22,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:33:22,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:33:22,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:33:22,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:33:22,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:33:22,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:33:22,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:33:22,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:33:22,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:33:22,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:33:22,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:33:22,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:33:22,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:33:22,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:33:22,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:33:22,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:33:22,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:33:22,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:33:22,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:33:22,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:33:22,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:33:22,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:33:22,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:33:22,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:33:22,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:33:22,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:33:22,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:33:22,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:33:22,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:33:22,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:33:22,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:33:22,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:33:22,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:33:22,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:33:22,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:33:22,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:33:22,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:33:22,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:33:22,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:33:22,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:33:22,923 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-12-13 12:33:22,944 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:33:22,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:33:22,945 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:33:22,945 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:33:22,945 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:33:22,946 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:33:22,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:33:22,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:33:22,947 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:33:22,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:33:22,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:33:22,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:33:22,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 12:33:22,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:33:22,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 12:33:22,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 12:33:22,948 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:33:22,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 12:33:22,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:33:22,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:33:22,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:33:22,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:33:22,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:33:22,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:33:22,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 12:33:22,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:33:22,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:33:22,950 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:33:22,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 12:33:22,951 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:33:22,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:33:22,951 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:33:22,951 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_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11ea6a807ddcb2daf8bb5097d2ce4398be45faeef70324f1726e469d3d120ac8 [2022-12-13 12:33:23,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:33:23,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:33:23,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:33:23,150 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:33:23,150 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:33:23,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i [2022-12-13 12:33:25,740 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:33:26,052 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:33:26,052 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i [2022-12-13 12:33:26,069 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/data/6ac143896/a88cc0ae2bbd4002b0121342f9187c7f/FLAGdce97cce8 [2022-12-13 12:33:26,081 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/data/6ac143896/a88cc0ae2bbd4002b0121342f9187c7f [2022-12-13 12:33:26,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:33:26,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:33:26,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:33:26,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:33:26,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:33:26,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:33:26" (1/1) ... [2022-12-13 12:33:26,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ea6dcae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:26, skipping insertion in model container [2022-12-13 12:33:26,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:33:26" (1/1) ... [2022-12-13 12:33:26,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:33:26,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:33:26,333 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_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i[4505,4518] [2022-12-13 12:33:26,339 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_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i[4565,4578] [2022-12-13 12:33:26,960 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 12:33:26,995 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:33:27,009 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:33:27,017 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,017 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,018 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,019 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,020 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,025 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:33:27,033 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,034 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,035 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,036 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,083 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 12:33:27,084 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 12:33:27,084 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 12:33:27,088 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 12:33:27,089 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 12:33:27,090 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 12:33:27,181 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:33:27,276 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 12:33:27,277 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 12:33:27,278 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 12:33:27,279 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 12:33:27,279 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 12:33:27,280 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 12:33:27,281 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 12:33:27,281 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 12:33:27,282 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 12:33:27,282 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 12:33:27,283 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 12:33:27,391 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:33:27,393 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:33:27,393 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,394 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,412 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:33:27,427 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 12:33:27,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:33:27,452 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:33:27,462 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_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i[4505,4518] [2022-12-13 12:33:27,462 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_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/sv-benchmarks/c/aws-c-common/aws_priority_queue_init_dynamic_harness_negated.i[4565,4578] [2022-12-13 12:33:27,486 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 12:33:27,490 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:33:27,495 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:33:27,498 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,498 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,499 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,499 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,500 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,502 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:33:27,505 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,506 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,506 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,507 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,511 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 12:33:27,512 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 12:33:27,512 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 12:33:27,514 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 12:33:27,515 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 12:33:27,515 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 12:33:27,517 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:33:27,531 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 12:33:27,532 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 12:33:27,532 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 12:33:27,533 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 12:33:27,533 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 12:33:27,534 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 12:33:27,534 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 12:33:27,535 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 12:33:27,535 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 12:33:27,535 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 12:33:27,536 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 12:33:27,555 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:33:27,556 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:33:27,556 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,557 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 12:33:27,561 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-12-13 12:33:27,569 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-13 12:33:27,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:33:27,699 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:33:27,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:27 WrapperNode [2022-12-13 12:33:27,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:33:27,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:33:27,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:33:27,700 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:33:27,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:27" (1/1) ... [2022-12-13 12:33:27,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:27" (1/1) ... [2022-12-13 12:33:27,790 INFO L138 Inliner]: procedures = 689, calls = 1513, calls flagged for inlining = 53, calls inlined = 9, statements flattened = 735 [2022-12-13 12:33:27,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:33:27,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:33:27,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:33:27,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:33:27,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:27" (1/1) ... [2022-12-13 12:33:27,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:27" (1/1) ... [2022-12-13 12:33:27,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:27" (1/1) ... [2022-12-13 12:33:27,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:27" (1/1) ... [2022-12-13 12:33:27,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:27" (1/1) ... [2022-12-13 12:33:27,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:27" (1/1) ... [2022-12-13 12:33:27,828 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:27" (1/1) ... [2022-12-13 12:33:27,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:27" (1/1) ... [2022-12-13 12:33:27,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:33:27,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:33:27,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:33:27,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:33:27,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:27" (1/1) ... [2022-12-13 12:33:27,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:33:27,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:27,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:33:27,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:33:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-12-13 12:33:27,896 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-12-13 12:33:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:33:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-12-13 12:33:27,896 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-12-13 12:33:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-12-13 12:33:27,896 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-12-13 12:33:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2022-12-13 12:33:27,896 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2022-12-13 12:33:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 12:33:27,896 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-12-13 12:33:27,897 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-12-13 12:33:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 12:33:27,897 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 12:33:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 12:33:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:33:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 12:33:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:33:27,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:33:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-12-13 12:33:27,897 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-12-13 12:33:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-12-13 12:33:27,897 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-12-13 12:33:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2022-12-13 12:33:27,897 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2022-12-13 12:33:27,897 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2022-12-13 12:33:27,898 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2022-12-13 12:33:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 12:33:27,898 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 12:33:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:33:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 12:33:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 12:33:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-12-13 12:33:27,898 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-12-13 12:33:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-12-13 12:33:27,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-12-13 12:33:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:33:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-12-13 12:33:27,898 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-12-13 12:33:27,898 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-12-13 12:33:27,898 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-12-13 12:33:27,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:33:28,111 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:33:28,113 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:33:28,790 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:33:28,797 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:33:28,797 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 12:33:28,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:33:28 BoogieIcfgContainer [2022-12-13 12:33:28,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:33:28,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:33:28,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:33:28,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:33:28,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:33:26" (1/3) ... [2022-12-13 12:33:28,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110ee5b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:33:28, skipping insertion in model container [2022-12-13 12:33:28,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:33:27" (2/3) ... [2022-12-13 12:33:28,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110ee5b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:33:28, skipping insertion in model container [2022-12-13 12:33:28,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:33:28" (3/3) ... [2022-12-13 12:33:28,805 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_init_dynamic_harness_negated.i [2022-12-13 12:33:28,819 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:33:28,820 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 12:33:28,859 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:33:28,864 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;@3469dc70, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:33:28,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 12:33:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 197 states, 129 states have (on average 1.2635658914728682) internal successors, (163), 129 states have internal predecessors, (163), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-12-13 12:33:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-13 12:33:28,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:33:28,877 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 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] [2022-12-13 12:33:28,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:33:28,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:28,881 INFO L85 PathProgramCache]: Analyzing trace with hash -657799819, now seen corresponding path program 1 times [2022-12-13 12:33:28,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:28,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724710844] [2022-12-13 12:33:28,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:28,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:29,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:29,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724710844] [2022-12-13 12:33:29,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-13 12:33:29,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890116858] [2022-12-13 12:33:29,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:29,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:29,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:29,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:29,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:33:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:29,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 2202 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 12:33:29,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-12-13 12:33:29,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:33:29,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890116858] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:33:29,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:33:29,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:33:29,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69840382] [2022-12-13 12:33:29,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:33:29,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 12:33:29,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:29,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 12:33:29,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 12:33:29,639 INFO L87 Difference]: Start difference. First operand has 197 states, 129 states have (on average 1.2635658914728682) internal successors, (163), 129 states have internal predecessors, (163), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) Second operand has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-13 12:33:29,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:33:29,685 INFO L93 Difference]: Finished difference Result 389 states and 571 transitions. [2022-12-13 12:33:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 12:33:29,686 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 99 [2022-12-13 12:33:29,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:33:29,693 INFO L225 Difference]: With dead ends: 389 [2022-12-13 12:33:29,693 INFO L226 Difference]: Without dead ends: 190 [2022-12-13 12:33:29,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 12:33:29,700 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:33:29,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:33:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-12-13 12:33:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-12-13 12:33:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 121 states have (on average 1.2314049586776858) internal successors, (149), 123 states have internal predecessors, (149), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-12-13 12:33:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 253 transitions. [2022-12-13 12:33:29,749 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 253 transitions. Word has length 99 [2022-12-13 12:33:29,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:33:29,750 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 253 transitions. [2022-12-13 12:33:29,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-13 12:33:29,750 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 253 transitions. [2022-12-13 12:33:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-13 12:33:29,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:33:29,755 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:29,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 12:33:29,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:29,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:33:29,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:29,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1585195372, now seen corresponding path program 1 times [2022-12-13 12:33:29,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:29,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561757990] [2022-12-13 12:33:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:29,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:30,044 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:33:30,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925987258] [2022-12-13 12:33:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:30,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:30,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:30,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:30,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 12:33:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:30,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 2356 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 12:33:30,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-12-13 12:33:30,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:33:30,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:30,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561757990] [2022-12-13 12:33:30,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:33:30,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925987258] [2022-12-13 12:33:30,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925987258] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:33:30,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:33:30,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 12:33:30,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069936290] [2022-12-13 12:33:30,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:33:30,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:33:30,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:30,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:33:30,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:33:30,500 INFO L87 Difference]: Start difference. First operand 190 states and 253 transitions. Second operand has 6 states, 5 states have (on average 11.6) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-12-13 12:33:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:33:30,601 INFO L93 Difference]: Finished difference Result 369 states and 486 transitions. [2022-12-13 12:33:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:33:30,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 133 [2022-12-13 12:33:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:33:30,604 INFO L225 Difference]: With dead ends: 369 [2022-12-13 12:33:30,604 INFO L226 Difference]: Without dead ends: 190 [2022-12-13 12:33:30,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:33:30,606 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 13 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:33:30,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1207 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:33:30,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-12-13 12:33:30,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-12-13 12:33:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 121 states have (on average 1.2231404958677685) internal successors, (148), 123 states have internal predecessors, (148), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-12-13 12:33:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 252 transitions. [2022-12-13 12:33:30,624 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 252 transitions. Word has length 133 [2022-12-13 12:33:30,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:33:30,624 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 252 transitions. [2022-12-13 12:33:30,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 6 states have internal predecessors, (58), 4 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2022-12-13 12:33:30,625 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 252 transitions. [2022-12-13 12:33:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-13 12:33:30,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:33:30,627 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:30,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 12:33:30,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:30,828 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:33:30,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:30,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1652660812, now seen corresponding path program 1 times [2022-12-13 12:33:30,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:30,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077422578] [2022-12-13 12:33:30,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:30,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:30,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:33:30,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858182497] [2022-12-13 12:33:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:30,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:30,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:30,901 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:30,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 12:33:31,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:31,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 2370 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 12:33:31,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-12-13 12:33:31,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:33:31,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:31,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077422578] [2022-12-13 12:33:31,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:33:31,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858182497] [2022-12-13 12:33:31,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858182497] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:33:31,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:33:31,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 12:33:31,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657931941] [2022-12-13 12:33:31,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:33:31,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 12:33:31,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:31,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 12:33:31,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:33:31,336 INFO L87 Difference]: Start difference. First operand 190 states and 252 transitions. Second operand has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2022-12-13 12:33:31,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:33:31,386 INFO L93 Difference]: Finished difference Result 365 states and 483 transitions. [2022-12-13 12:33:31,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:33:31,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) Word has length 135 [2022-12-13 12:33:31,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:33:31,388 INFO L225 Difference]: With dead ends: 365 [2022-12-13 12:33:31,389 INFO L226 Difference]: Without dead ends: 192 [2022-12-13 12:33:31,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:33:31,396 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 10 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:33:31,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 724 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:33:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-12-13 12:33:31,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2022-12-13 12:33:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 122 states have (on average 1.221311475409836) internal successors, (149), 124 states have internal predecessors, (149), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-12-13 12:33:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 253 transitions. [2022-12-13 12:33:31,411 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 253 transitions. Word has length 135 [2022-12-13 12:33:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:33:31,412 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 253 transitions. [2022-12-13 12:33:31,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (22), 3 states have call predecessors, (22), 4 states have call successors, (22) [2022-12-13 12:33:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 253 transitions. [2022-12-13 12:33:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-13 12:33:31,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:33:31,414 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:31,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 12:33:31,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:31,615 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:33:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:31,616 INFO L85 PathProgramCache]: Analyzing trace with hash 572430708, now seen corresponding path program 1 times [2022-12-13 12:33:31,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:31,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655310096] [2022-12-13 12:33:31,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:31,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:31,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:33:31,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537205901] [2022-12-13 12:33:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:31,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:31,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:31,684 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:31,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 12:33:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:33:32,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 2408 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:33:32,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 153 proven. 1 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-12-13 12:33:32,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 12:33:32,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:32,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655310096] [2022-12-13 12:33:32,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:33:32,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537205901] [2022-12-13 12:33:32,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537205901] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:32,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:33:32,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-12-13 12:33:32,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679105332] [2022-12-13 12:33:32,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:32,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 12:33:32,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:32,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 12:33:32,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-12-13 12:33:32,404 INFO L87 Difference]: Start difference. First operand 191 states and 253 transitions. Second operand has 13 states, 11 states have (on average 7.454545454545454) internal successors, (82), 13 states have internal predecessors, (82), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-13 12:33:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:33:32,539 INFO L93 Difference]: Finished difference Result 374 states and 490 transitions. [2022-12-13 12:33:32,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:33:32,540 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 7.454545454545454) internal successors, (82), 13 states have internal predecessors, (82), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 139 [2022-12-13 12:33:32,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:33:32,541 INFO L225 Difference]: With dead ends: 374 [2022-12-13 12:33:32,541 INFO L226 Difference]: Without dead ends: 194 [2022-12-13 12:33:32,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-13 12:33:32,542 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 15 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1923 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:33:32,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1923 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:33:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-12-13 12:33:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-12-13 12:33:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 124 states have (on average 1.217741935483871) internal successors, (151), 126 states have internal predecessors, (151), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-12-13 12:33:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 255 transitions. [2022-12-13 12:33:32,552 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 255 transitions. Word has length 139 [2022-12-13 12:33:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:33:32,552 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 255 transitions. [2022-12-13 12:33:32,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 7.454545454545454) internal successors, (82), 13 states have internal predecessors, (82), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-13 12:33:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 255 transitions. [2022-12-13 12:33:32,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-13 12:33:32,554 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:33:32,554 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:32,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 12:33:32,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:32,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:33:32,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:32,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1735214028, now seen corresponding path program 2 times [2022-12-13 12:33:32,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:32,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732924123] [2022-12-13 12:33:32,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:32,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:32,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:33:32,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788319075] [2022-12-13 12:33:32,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:33:32,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:32,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:32,798 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:32,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 12:33:33,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:33:33,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:33:33,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 2446 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 12:33:33,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 31 proven. 4 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-12-13 12:33:33,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-12-13 12:33:34,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:34,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732924123] [2022-12-13 12:33:34,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:33:34,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788319075] [2022-12-13 12:33:34,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788319075] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:34,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:33:34,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-12-13 12:33:34,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049190621] [2022-12-13 12:33:34,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:34,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 12:33:34,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 12:33:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-13 12:33:34,096 INFO L87 Difference]: Start difference. First operand 193 states and 255 transitions. Second operand has 15 states, 13 states have (on average 5.615384615384615) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-13 12:33:34,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:33:34,268 INFO L93 Difference]: Finished difference Result 378 states and 494 transitions. [2022-12-13 12:33:34,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 12:33:34,269 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 5.615384615384615) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 143 [2022-12-13 12:33:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:33:34,270 INFO L225 Difference]: With dead ends: 378 [2022-12-13 12:33:34,270 INFO L226 Difference]: Without dead ends: 196 [2022-12-13 12:33:34,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-12-13 12:33:34,272 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 14 mSDsluCounter, 2641 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2886 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:33:34,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2886 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:33:34,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-13 12:33:34,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2022-12-13 12:33:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 126 states have (on average 1.2142857142857142) internal successors, (153), 128 states have internal predecessors, (153), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-12-13 12:33:34,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 257 transitions. [2022-12-13 12:33:34,286 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 257 transitions. Word has length 143 [2022-12-13 12:33:34,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:33:34,286 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 257 transitions. [2022-12-13 12:33:34,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 5.615384615384615) internal successors, (73), 15 states have internal predecessors, (73), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-13 12:33:34,287 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 257 transitions. [2022-12-13 12:33:34,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-13 12:33:34,288 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:33:34,289 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:34,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 12:33:34,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:34,492 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:33:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:34,493 INFO L85 PathProgramCache]: Analyzing trace with hash 831753716, now seen corresponding path program 3 times [2022-12-13 12:33:34,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:34,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998596665] [2022-12-13 12:33:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:34,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:34,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:33:34,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993283049] [2022-12-13 12:33:34,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:33:34,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:34,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:34,624 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:34,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 12:33:35,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 12:33:35,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:33:35,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 2072 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 12:33:35,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 43 proven. 9 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-12-13 12:33:35,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2022-12-13 12:33:36,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:36,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998596665] [2022-12-13 12:33:36,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:33:36,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993283049] [2022-12-13 12:33:36,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993283049] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:36,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:33:36,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-12-13 12:33:36,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254849027] [2022-12-13 12:33:36,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:36,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 12:33:36,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:36,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 12:33:36,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-13 12:33:36,531 INFO L87 Difference]: Start difference. First operand 195 states and 257 transitions. Second operand has 19 states, 17 states have (on average 4.529411764705882) internal successors, (77), 19 states have internal predecessors, (77), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-13 12:33:36,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:33:36,876 INFO L93 Difference]: Finished difference Result 382 states and 498 transitions. [2022-12-13 12:33:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:33:36,877 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.529411764705882) internal successors, (77), 19 states have internal predecessors, (77), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 147 [2022-12-13 12:33:36,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:33:36,878 INFO L225 Difference]: With dead ends: 382 [2022-12-13 12:33:36,878 INFO L226 Difference]: Without dead ends: 198 [2022-12-13 12:33:36,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2022-12-13 12:33:36,880 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 35 mSDsluCounter, 2394 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2638 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:33:36,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2638 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:33:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-12-13 12:33:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2022-12-13 12:33:36,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 128 states have (on average 1.2109375) internal successors, (155), 130 states have internal predecessors, (155), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-12-13 12:33:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 259 transitions. [2022-12-13 12:33:36,893 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 259 transitions. Word has length 147 [2022-12-13 12:33:36,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:33:36,894 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 259 transitions. [2022-12-13 12:33:36,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.529411764705882) internal successors, (77), 19 states have internal predecessors, (77), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-13 12:33:36,894 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 259 transitions. [2022-12-13 12:33:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-13 12:33:36,895 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:33:36,895 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:36,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 12:33:37,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:37,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:33:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:37,098 INFO L85 PathProgramCache]: Analyzing trace with hash 577359540, now seen corresponding path program 4 times [2022-12-13 12:33:37,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:37,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247427309] [2022-12-13 12:33:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:37,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:37,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:33:37,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314169564] [2022-12-13 12:33:37,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:33:37,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:37,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:37,193 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:37,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 12:33:37,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:33:37,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:33:37,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 12:33:37,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 189 proven. 16 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-12-13 12:33:37,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-12-13 12:33:38,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:38,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247427309] [2022-12-13 12:33:38,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:33:38,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314169564] [2022-12-13 12:33:38,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314169564] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:38,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:33:38,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-12-13 12:33:38,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98039631] [2022-12-13 12:33:38,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:38,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 12:33:38,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:38,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 12:33:38,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-12-13 12:33:38,350 INFO L87 Difference]: Start difference. First operand 197 states and 259 transitions. Second operand has 21 states, 19 states have (on average 4.947368421052632) internal successors, (94), 21 states have internal predecessors, (94), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-13 12:33:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:33:38,724 INFO L93 Difference]: Finished difference Result 386 states and 502 transitions. [2022-12-13 12:33:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:33:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 4.947368421052632) internal successors, (94), 21 states have internal predecessors, (94), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 151 [2022-12-13 12:33:38,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:33:38,726 INFO L225 Difference]: With dead ends: 386 [2022-12-13 12:33:38,726 INFO L226 Difference]: Without dead ends: 200 [2022-12-13 12:33:38,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-12-13 12:33:38,727 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 22 mSDsluCounter, 3367 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3612 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:33:38,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3612 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:33:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-12-13 12:33:38,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2022-12-13 12:33:38,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 130 states have (on average 1.2076923076923076) internal successors, (157), 132 states have internal predecessors, (157), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-12-13 12:33:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 261 transitions. [2022-12-13 12:33:38,734 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 261 transitions. Word has length 151 [2022-12-13 12:33:38,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:33:38,734 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 261 transitions. [2022-12-13 12:33:38,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 4.947368421052632) internal successors, (94), 21 states have internal predecessors, (94), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-13 12:33:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 261 transitions. [2022-12-13 12:33:38,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-13 12:33:38,735 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:33:38,736 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:38,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 12:33:38,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:38,937 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:33:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:38,938 INFO L85 PathProgramCache]: Analyzing trace with hash -521257356, now seen corresponding path program 5 times [2022-12-13 12:33:38,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:38,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267534343] [2022-12-13 12:33:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:38,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:39,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:33:39,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853018312] [2022-12-13 12:33:39,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:33:39,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:39,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:39,027 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:39,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 12:33:41,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-13 12:33:41,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:33:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:33:41,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:33:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 209 proven. 25 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-12-13 12:33:41,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:33:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-12-13 12:33:41,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:33:41,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267534343] [2022-12-13 12:33:41,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:33:41,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853018312] [2022-12-13 12:33:41,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853018312] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:33:41,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:33:41,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-12-13 12:33:41,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895404294] [2022-12-13 12:33:41,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:33:41,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 12:33:41,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:33:41,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 12:33:41,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-12-13 12:33:41,820 INFO L87 Difference]: Start difference. First operand 199 states and 261 transitions. Second operand has 21 states, 19 states have (on average 5.157894736842105) internal successors, (98), 21 states have internal predecessors, (98), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-13 12:33:42,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:33:42,059 INFO L93 Difference]: Finished difference Result 390 states and 506 transitions. [2022-12-13 12:33:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 12:33:42,060 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 5.157894736842105) internal successors, (98), 21 states have internal predecessors, (98), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 155 [2022-12-13 12:33:42,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:33:42,061 INFO L225 Difference]: With dead ends: 390 [2022-12-13 12:33:42,061 INFO L226 Difference]: Without dead ends: 202 [2022-12-13 12:33:42,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-12-13 12:33:42,062 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 26 mSDsluCounter, 2891 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 3136 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:33:42,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 3136 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:33:42,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-13 12:33:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2022-12-13 12:33:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 132 states have (on average 1.2045454545454546) internal successors, (159), 134 states have internal predecessors, (159), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-12-13 12:33:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 263 transitions. [2022-12-13 12:33:42,069 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 263 transitions. Word has length 155 [2022-12-13 12:33:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:33:42,069 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 263 transitions. [2022-12-13 12:33:42,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 5.157894736842105) internal successors, (98), 21 states have internal predecessors, (98), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-13 12:33:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 263 transitions. [2022-12-13 12:33:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-13 12:33:42,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:33:42,070 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:33:42,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 12:33:42,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 12:33:42,271 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:33:42,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:33:42,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1602854196, now seen corresponding path program 6 times [2022-12-13 12:33:42,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:33:42,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345036567] [2022-12-13 12:33:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:33:42,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:33:42,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:33:42,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046679376] [2022-12-13 12:33:42,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:33:42,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:33:42,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:33:42,316 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:33:42,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 12:39:26,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-12-13 12:39:26,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:39:26,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 12:39:26,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:39:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 37 proven. 138 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-12-13 12:39:26,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:39:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 94 proven. 36 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2022-12-13 12:39:27,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:39:27,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345036567] [2022-12-13 12:39:27,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:39:27,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046679376] [2022-12-13 12:39:27,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046679376] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:39:27,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:39:27,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 29 [2022-12-13 12:39:27,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103518661] [2022-12-13 12:39:27,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:39:27,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 12:39:27,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:39:27,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 12:39:27,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-12-13 12:39:27,310 INFO L87 Difference]: Start difference. First operand 201 states and 263 transitions. Second operand has 29 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 29 states have internal predecessors, (102), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-13 12:39:27,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:39:27,626 INFO L93 Difference]: Finished difference Result 394 states and 510 transitions. [2022-12-13 12:39:27,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 12:39:27,627 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 29 states have internal predecessors, (102), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 159 [2022-12-13 12:39:27,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:39:27,628 INFO L225 Difference]: With dead ends: 394 [2022-12-13 12:39:27,628 INFO L226 Difference]: Without dead ends: 204 [2022-12-13 12:39:27,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-12-13 12:39:27,629 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 21 mSDsluCounter, 4110 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4355 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:39:27,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4355 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:39:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-12-13 12:39:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2022-12-13 12:39:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 134 states have (on average 1.2014925373134329) internal successors, (161), 136 states have internal predecessors, (161), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-12-13 12:39:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 265 transitions. [2022-12-13 12:39:27,637 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 265 transitions. Word has length 159 [2022-12-13 12:39:27,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:39:27,638 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 265 transitions. [2022-12-13 12:39:27,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.7777777777777777) internal successors, (102), 29 states have internal predecessors, (102), 6 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2022-12-13 12:39:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 265 transitions. [2022-12-13 12:39:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-13 12:39:27,639 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:39:27,639 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:39:27,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 12:39:27,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:39:27,840 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:39:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:39:27,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1228188404, now seen corresponding path program 7 times [2022-12-13 12:39:27,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:39:27,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949782183] [2022-12-13 12:39:27,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:39:27,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:39:27,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:39:27,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003757506] [2022-12-13 12:39:27,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:39:27,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:39:27,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:39:27,925 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:39:27,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 12:39:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:39:28,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 2636 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 12:39:28,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:39:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 9 proven. 168 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-12-13 12:39:28,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:39:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 122 proven. 49 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-12-13 12:39:29,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:39:29,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949782183] [2022-12-13 12:39:29,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:39:29,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003757506] [2022-12-13 12:39:29,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003757506] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:39:29,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:39:29,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2022-12-13 12:39:29,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941773881] [2022-12-13 12:39:29,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:39:29,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 12:39:29,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:39:29,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 12:39:29,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-12-13 12:39:29,090 INFO L87 Difference]: Start difference. First operand 203 states and 265 transitions. Second operand has 27 states, 25 states have (on average 4.04) internal successors, (101), 27 states have internal predecessors, (101), 6 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) [2022-12-13 12:39:29,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:39:29,421 INFO L93 Difference]: Finished difference Result 398 states and 514 transitions. [2022-12-13 12:39:29,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 12:39:29,422 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.04) internal successors, (101), 27 states have internal predecessors, (101), 6 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) Word has length 163 [2022-12-13 12:39:29,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:39:29,423 INFO L225 Difference]: With dead ends: 398 [2022-12-13 12:39:29,423 INFO L226 Difference]: Without dead ends: 206 [2022-12-13 12:39:29,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 12:39:29,424 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 23 mSDsluCounter, 3124 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3367 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:39:29,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 3367 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:39:29,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-12-13 12:39:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-12-13 12:39:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 136 states have (on average 1.1985294117647058) internal successors, (163), 138 states have internal predecessors, (163), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-12-13 12:39:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 267 transitions. [2022-12-13 12:39:29,430 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 267 transitions. Word has length 163 [2022-12-13 12:39:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:39:29,431 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 267 transitions. [2022-12-13 12:39:29,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.04) internal successors, (101), 27 states have internal predecessors, (101), 6 states have call successors, (26), 2 states have call predecessors, (26), 7 states have return successors, (28), 7 states have call predecessors, (28), 6 states have call successors, (28) [2022-12-13 12:39:29,431 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 267 transitions. [2022-12-13 12:39:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-13 12:39:29,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:39:29,431 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:39:29,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 12:39:29,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 12:39:29,633 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:39:29,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:39:29,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1031284660, now seen corresponding path program 8 times [2022-12-13 12:39:29,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:39:29,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832604177] [2022-12-13 12:39:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:39:29,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:39:29,766 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:39:29,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351750081] [2022-12-13 12:39:29,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:39:29,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:39:29,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:39:29,767 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:39:29,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 12:39:31,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:39:31,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:39:31,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 2674 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 12:39:31,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:39:31,229 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 293 proven. 64 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-12-13 12:39:31,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:39:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-12-13 12:39:31,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:39:31,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832604177] [2022-12-13 12:39:31,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:39:31,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351750081] [2022-12-13 12:39:31,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351750081] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:39:31,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:39:31,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2022-12-13 12:39:31,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396881699] [2022-12-13 12:39:31,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:39:31,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 12:39:31,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:39:31,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 12:39:31,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-12-13 12:39:31,736 INFO L87 Difference]: Start difference. First operand 205 states and 267 transitions. Second operand has 27 states, 25 states have (on average 4.4) internal successors, (110), 27 states have internal predecessors, (110), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-13 12:39:32,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:39:32,054 INFO L93 Difference]: Finished difference Result 402 states and 518 transitions. [2022-12-13 12:39:32,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:39:32,054 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.4) internal successors, (110), 27 states have internal predecessors, (110), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) Word has length 167 [2022-12-13 12:39:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:39:32,055 INFO L225 Difference]: With dead ends: 402 [2022-12-13 12:39:32,055 INFO L226 Difference]: Without dead ends: 208 [2022-12-13 12:39:32,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2022-12-13 12:39:32,056 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 20 mSDsluCounter, 3385 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3630 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:39:32,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3630 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:39:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-12-13 12:39:32,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-12-13 12:39:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 138 states have (on average 1.1956521739130435) internal successors, (165), 140 states have internal predecessors, (165), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-12-13 12:39:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 269 transitions. [2022-12-13 12:39:32,062 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 269 transitions. Word has length 167 [2022-12-13 12:39:32,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:39:32,063 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 269 transitions. [2022-12-13 12:39:32,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.4) internal successors, (110), 27 states have internal predecessors, (110), 6 states have call successors, (32), 2 states have call predecessors, (32), 5 states have return successors, (32), 6 states have call predecessors, (32), 6 states have call successors, (32) [2022-12-13 12:39:32,063 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 269 transitions. [2022-12-13 12:39:32,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-12-13 12:39:32,063 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:39:32,064 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:39:32,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 12:39:32,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 12:39:32,265 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:39:32,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:39:32,267 INFO L85 PathProgramCache]: Analyzing trace with hash 208458612, now seen corresponding path program 9 times [2022-12-13 12:39:32,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:39:32,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417875236] [2022-12-13 12:39:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:39:32,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:39:32,358 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:39:32,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008633387] [2022-12-13 12:39:32,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:39:32,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:39:32,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:39:32,359 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:39:32,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ddce26-b38d-4a29-896d-3fe5bdf85bfc/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process