./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.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_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/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_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/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_027dff90-90c2-445d-b7a1-666288f02da8/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 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d --- 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 15:12:16,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:12:16,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:12:16,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:12:16,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:12:16,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:12:16,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:12:17,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:12:17,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:12:17,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:12:17,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:12:17,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:12:17,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:12:17,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:12:17,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:12:17,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:12:17,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:12:17,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:12:17,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:12:17,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:12:17,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:12:17,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:12:17,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:12:17,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:12:17,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:12:17,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:12:17,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:12:17,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:12:17,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:12:17,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:12:17,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:12:17,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:12:17,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:12:17,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:12:17,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:12:17,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:12:17,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:12:17,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:12:17,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:12:17,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:12:17,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:12:17,031 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-12-13 15:12:17,050 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:12:17,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:12:17,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:12:17,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:12:17,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:12:17,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:12:17,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:12:17,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:12:17,053 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:12:17,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:12:17,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:12:17,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:12:17,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:12:17,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:12:17,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:12:17,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:12:17,054 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:12:17,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:12:17,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:12:17,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:12:17,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:12:17,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:12:17,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:12:17,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:12:17,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:12:17,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:12:17,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:12:17,056 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:12:17,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:12:17,056 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:12:17,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:12:17,056 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:12:17,056 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_027dff90-90c2-445d-b7a1-666288f02da8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b917a1c951859368fb2463a158063964361d86aeab261c924186dc34055576d [2022-12-13 15:12:17,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:12:17,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:12:17,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:12:17,257 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:12:17,257 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:12:17,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2022-12-13 15:12:19,801 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:12:20,120 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:12:20,121 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i [2022-12-13 15:12:20,143 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/data/9003ac5e7/ac3cb604c9bd402c8d472cd49e46a20e/FLAG2c9bd2f7b [2022-12-13 15:12:20,154 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/data/9003ac5e7/ac3cb604c9bd402c8d472cd49e46a20e [2022-12-13 15:12:20,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:12:20,157 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:12:20,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:12:20,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:12:20,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:12:20,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:12:20" (1/1) ... [2022-12-13 15:12:20,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c257933 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:12:20, skipping insertion in model container [2022-12-13 15:12:20,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:12:20" (1/1) ... [2022-12-13 15:12:20,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:12:20,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:12:20,393 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_027dff90-90c2-445d-b7a1-666288f02da8/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2022-12-13 15:12:20,399 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_027dff90-90c2-445d-b7a1-666288f02da8/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2022-12-13 15:12:20,902 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 15:12:20,908 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:20,909 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:20,910 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:20,910 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:20,912 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:20,925 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:20,925 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:20,927 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:20,928 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:20,930 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:20,931 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:20,931 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:20,932 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:20,979 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 15:12:20,979 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 15:12:20,980 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 15:12:20,983 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 15:12:20,984 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 15:12:20,984 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 15:12:21,171 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 15:12:21,172 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 15:12:21,173 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 15:12:21,174 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 15:12:21,175 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 15:12:21,176 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 15:12:21,176 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 15:12:21,177 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 15:12:21,177 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 15:12:21,178 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 15:12:21,178 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 15:12:21,280 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 15:12:21,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:12:21,307 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:12:21,316 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_027dff90-90c2-445d-b7a1-666288f02da8/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4494,4507] [2022-12-13 15:12:21,317 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_027dff90-90c2-445d-b7a1-666288f02da8/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness.i[4554,4567] [2022-12-13 15:12:21,342 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 15:12:21,344 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:21,344 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:21,344 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:21,345 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:21,345 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:21,350 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:21,351 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:21,352 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:21,352 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:21,353 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:21,353 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:21,354 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:21,354 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 15:12:21,359 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 15:12:21,359 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 15:12:21,360 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 15:12:21,363 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 15:12:21,364 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 15:12:21,364 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 15:12:21,380 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 15:12:21,381 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 15:12:21,382 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 15:12:21,382 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 15:12:21,383 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 15:12:21,383 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 15:12:21,384 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 15:12:21,384 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 15:12:21,385 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 15:12:21,385 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 15:12:21,385 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 15:12:21,402 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 15:12:21,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:12:21,546 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:12:21,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:12:21 WrapperNode [2022-12-13 15:12:21,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:12:21,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:12:21,547 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:12:21,547 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:12:21,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:12:21" (1/1) ... [2022-12-13 15:12:21,592 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:12:21" (1/1) ... [2022-12-13 15:12:21,613 INFO L138 Inliner]: procedures = 679, calls = 1035, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 92 [2022-12-13 15:12:21,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:12:21,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:12:21,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:12:21,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:12:21,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:12:21" (1/1) ... [2022-12-13 15:12:21,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:12:21" (1/1) ... [2022-12-13 15:12:21,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:12:21" (1/1) ... [2022-12-13 15:12:21,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:12:21" (1/1) ... [2022-12-13 15:12:21,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:12:21" (1/1) ... [2022-12-13 15:12:21,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:12:21" (1/1) ... [2022-12-13 15:12:21,635 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:12:21" (1/1) ... [2022-12-13 15:12:21,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:12:21" (1/1) ... [2022-12-13 15:12:21,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:12:21,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:12:21,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:12:21,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:12:21,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:12:21" (1/1) ... [2022-12-13 15:12:21,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:12:21,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:12:21,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:12:21,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:12:21,698 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2022-12-13 15:12:21,698 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2022-12-13 15:12:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:12:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 15:12:21,699 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 15:12:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-13 15:12:21,699 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-13 15:12:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-13 15:12:21,699 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-13 15:12:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:12:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 15:12:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:12:21,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:12:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-12-13 15:12:21,699 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-12-13 15:12:21,699 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 15:12:21,700 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 15:12:21,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:12:21,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 15:12:21,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 15:12:21,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:12:21,872 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:12:21,874 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:12:22,051 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:12:22,058 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:12:22,058 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 15:12:22,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:12:22 BoogieIcfgContainer [2022-12-13 15:12:22,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:12:22,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:12:22,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:12:22,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:12:22,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:12:20" (1/3) ... [2022-12-13 15:12:22,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2274813c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:12:22, skipping insertion in model container [2022-12-13 15:12:22,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:12:21" (2/3) ... [2022-12-13 15:12:22,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2274813c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:12:22, skipping insertion in model container [2022-12-13 15:12:22,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:12:22" (3/3) ... [2022-12-13 15:12:22,068 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_init_harness.i [2022-12-13 15:12:22,082 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:12:22,082 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:12:22,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:12:22,128 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;@6c27cf3c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:12:22,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 15:12:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 44 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 15:12:22,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 15:12:22,139 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:22,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 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 15:12:22,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:22,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:22,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1017333715, now seen corresponding path program 1 times [2022-12-13 15:12:22,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:22,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396552472] [2022-12-13 15:12:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:22,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:22,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:22,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:22,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:22,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396552472] [2022-12-13 15:12:22,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396552472] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:12:22,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:12:22,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:12:22,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128217262] [2022-12-13 15:12:22,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:22,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 15:12:22,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:22,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 15:12:22,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 15:12:22,474 INFO L87 Difference]: Start difference. First operand has 61 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 44 states have internal predecessors, (58), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:12:22,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:22,498 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2022-12-13 15:12:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 15:12:22,500 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-12-13 15:12:22,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:22,505 INFO L225 Difference]: With dead ends: 117 [2022-12-13 15:12:22,506 INFO L226 Difference]: Without dead ends: 56 [2022-12-13 15:12:22,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 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 15:12:22,510 INFO L413 NwaCegarLoop]: 75 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, 75 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 15:12:22,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:12:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-13 15:12:22,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-12-13 15:12:22,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 40 states have internal predecessors, (51), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-13 15:12:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-12-13 15:12:22,539 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 26 [2022-12-13 15:12:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:22,539 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-12-13 15:12:22,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:12:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-12-13 15:12:22,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 15:12:22,540 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:22,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 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 15:12:22,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:12:22,541 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:22,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1834982165, now seen corresponding path program 1 times [2022-12-13 15:12:22,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:22,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395216804] [2022-12-13 15:12:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:22,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:23,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:23,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:23,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:23,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395216804] [2022-12-13 15:12:23,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395216804] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:12:23,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:12:23,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 15:12:23,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238559242] [2022-12-13 15:12:23,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:23,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 15:12:23,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:23,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 15:12:23,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:12:23,159 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:12:23,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:23,355 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2022-12-13 15:12:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:12:23,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-12-13 15:12:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:23,358 INFO L225 Difference]: With dead ends: 108 [2022-12-13 15:12:23,358 INFO L226 Difference]: Without dead ends: 59 [2022-12-13 15:12:23,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:12:23,360 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 29 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:23,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 320 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:12:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-13 15:12:23,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-12-13 15:12:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 43 states have internal predecessors, (54), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-12-13 15:12:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-12-13 15:12:23,371 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 26 [2022-12-13 15:12:23,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:23,372 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-12-13 15:12:23,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:12:23,372 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-12-13 15:12:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 15:12:23,373 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:23,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 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 15:12:23,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:12:23,373 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:23,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:23,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1650638505, now seen corresponding path program 1 times [2022-12-13 15:12:23,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:23,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109471803] [2022-12-13 15:12:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:23,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:23,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:23,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:23,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:23,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109471803] [2022-12-13 15:12:23,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109471803] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:12:23,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:12:23,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 15:12:23,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790106858] [2022-12-13 15:12:23,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:23,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:12:23,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:23,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:12:23,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:12:23,814 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:12:24,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:24,052 INFO L93 Difference]: Finished difference Result 124 states and 161 transitions. [2022-12-13 15:12:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:12:24,053 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-12-13 15:12:24,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:24,054 INFO L225 Difference]: With dead ends: 124 [2022-12-13 15:12:24,054 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 15:12:24,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:12:24,055 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 74 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:24,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 409 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:12:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 15:12:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-12-13 15:12:24,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.38) internal successors, (69), 52 states have internal predecessors, (69), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-12-13 15:12:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2022-12-13 15:12:24,064 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 26 [2022-12-13 15:12:24,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:24,064 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2022-12-13 15:12:24,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:12:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2022-12-13 15:12:24,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 15:12:24,064 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:24,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 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 15:12:24,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:12:24,065 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:24,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:24,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1257611495, now seen corresponding path program 1 times [2022-12-13 15:12:24,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:24,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070331216] [2022-12-13 15:12:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:24,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:24,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:24,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:24,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:24,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070331216] [2022-12-13 15:12:24,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070331216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:12:24,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:12:24,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 15:12:24,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110192766] [2022-12-13 15:12:24,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:24,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:12:24,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:24,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:12:24,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:12:24,481 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:12:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:24,687 INFO L93 Difference]: Finished difference Result 152 states and 207 transitions. [2022-12-13 15:12:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:12:24,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-12-13 15:12:24,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:24,690 INFO L225 Difference]: With dead ends: 152 [2022-12-13 15:12:24,690 INFO L226 Difference]: Without dead ends: 90 [2022-12-13 15:12:24,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:12:24,691 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 81 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:24,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 375 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:12:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-13 15:12:24,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2022-12-13 15:12:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.3888888888888888) internal successors, (75), 56 states have internal predecessors, (75), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-12-13 15:12:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 97 transitions. [2022-12-13 15:12:24,699 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 97 transitions. Word has length 26 [2022-12-13 15:12:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:24,699 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 97 transitions. [2022-12-13 15:12:24,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:12:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 97 transitions. [2022-12-13 15:12:24,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 15:12:24,699 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:24,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 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 15:12:24,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:12:24,700 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:24,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:24,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1515776933, now seen corresponding path program 1 times [2022-12-13 15:12:24,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:24,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997634613] [2022-12-13 15:12:24,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:24,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:24,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:24,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:24,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:24,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997634613] [2022-12-13 15:12:24,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997634613] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:12:24,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:12:24,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 15:12:24,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189376842] [2022-12-13 15:12:24,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:24,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:12:24,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:24,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:12:24,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:12:24,878 INFO L87 Difference]: Start difference. First operand 73 states and 97 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:12:25,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:25,064 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2022-12-13 15:12:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:12:25,064 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-12-13 15:12:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:25,065 INFO L225 Difference]: With dead ends: 176 [2022-12-13 15:12:25,065 INFO L226 Difference]: Without dead ends: 110 [2022-12-13 15:12:25,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:12:25,066 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 68 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:25,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 480 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:12:25,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-13 15:12:25,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2022-12-13 15:12:25,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.396551724137931) internal successors, (81), 60 states have internal predecessors, (81), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-12-13 15:12:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2022-12-13 15:12:25,074 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 26 [2022-12-13 15:12:25,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:25,074 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2022-12-13 15:12:25,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 15:12:25,074 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2022-12-13 15:12:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 15:12:25,075 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:25,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 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 15:12:25,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:12:25,075 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:25,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:25,076 INFO L85 PathProgramCache]: Analyzing trace with hash 504659683, now seen corresponding path program 1 times [2022-12-13 15:12:25,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:25,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848367943] [2022-12-13 15:12:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:25,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:25,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:25,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:25,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:25,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848367943] [2022-12-13 15:12:25,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848367943] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:12:25,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:12:25,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:12:25,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693741397] [2022-12-13 15:12:25,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:25,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:12:25,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:25,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:12:25,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:12:25,178 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 15:12:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:25,236 INFO L93 Difference]: Finished difference Result 173 states and 239 transitions. [2022-12-13 15:12:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:12:25,237 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-12-13 15:12:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:25,238 INFO L225 Difference]: With dead ends: 173 [2022-12-13 15:12:25,238 INFO L226 Difference]: Without dead ends: 70 [2022-12-13 15:12:25,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:12:25,239 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 36 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:25,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 380 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:12:25,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-13 15:12:25,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-12-13 15:12:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 53 states have internal predecessors, (69), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-12-13 15:12:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 91 transitions. [2022-12-13 15:12:25,245 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 91 transitions. Word has length 26 [2022-12-13 15:12:25,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:25,245 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 91 transitions. [2022-12-13 15:12:25,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 15:12:25,245 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 91 transitions. [2022-12-13 15:12:25,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 15:12:25,246 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:25,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 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 15:12:25,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 15:12:25,247 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:25,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:25,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1687611897, now seen corresponding path program 1 times [2022-12-13 15:12:25,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:25,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486137756] [2022-12-13 15:12:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:25,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:25,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:25,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:25,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:25,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:25,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486137756] [2022-12-13 15:12:25,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486137756] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:12:25,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:12:25,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 15:12:25,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172047218] [2022-12-13 15:12:25,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:25,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:12:25,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:25,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:12:25,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:12:25,416 INFO L87 Difference]: Start difference. First operand 70 states and 91 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 15:12:25,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:25,504 INFO L93 Difference]: Finished difference Result 135 states and 178 transitions. [2022-12-13 15:12:25,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:12:25,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-12-13 15:12:25,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:25,505 INFO L225 Difference]: With dead ends: 135 [2022-12-13 15:12:25,505 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 15:12:25,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:12:25,506 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 33 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:25,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 322 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:12:25,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 15:12:25,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2022-12-13 15:12:25,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 53 states have internal predecessors, (67), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-12-13 15:12:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2022-12-13 15:12:25,518 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 28 [2022-12-13 15:12:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:25,518 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2022-12-13 15:12:25,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 15:12:25,518 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2022-12-13 15:12:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 15:12:25,519 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:25,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 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 15:12:25,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:12:25,519 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:25,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1850407916, now seen corresponding path program 1 times [2022-12-13 15:12:25,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:25,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230318786] [2022-12-13 15:12:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:25,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:25,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:25,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:25,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:25,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230318786] [2022-12-13 15:12:25,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230318786] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:12:25,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:12:25,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:12:25,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123898605] [2022-12-13 15:12:25,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:25,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:12:25,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:25,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:12:25,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:12:25,657 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 15:12:25,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:25,717 INFO L93 Difference]: Finished difference Result 143 states and 185 transitions. [2022-12-13 15:12:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:12:25,717 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-12-13 15:12:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:25,718 INFO L225 Difference]: With dead ends: 143 [2022-12-13 15:12:25,718 INFO L226 Difference]: Without dead ends: 80 [2022-12-13 15:12:25,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:12:25,719 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 15 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:25,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 266 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:12:25,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-13 15:12:25,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2022-12-13 15:12:25,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 55 states have internal predecessors, (69), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-12-13 15:12:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2022-12-13 15:12:25,731 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 30 [2022-12-13 15:12:25,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:25,732 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2022-12-13 15:12:25,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 15:12:25,732 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2022-12-13 15:12:25,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 15:12:25,733 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:25,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 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 15:12:25,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 15:12:25,733 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1395309347, now seen corresponding path program 1 times [2022-12-13 15:12:25,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:25,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896053142] [2022-12-13 15:12:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:25,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:25,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:25,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:25,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:25,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896053142] [2022-12-13 15:12:25,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896053142] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:12:25,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:12:25,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:12:25,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574193046] [2022-12-13 15:12:25,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:25,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:12:25,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:25,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:12:25,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:12:25,864 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 15:12:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:25,925 INFO L93 Difference]: Finished difference Result 149 states and 195 transitions. [2022-12-13 15:12:25,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:12:25,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-12-13 15:12:25,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:25,926 INFO L225 Difference]: With dead ends: 149 [2022-12-13 15:12:25,926 INFO L226 Difference]: Without dead ends: 84 [2022-12-13 15:12:25,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:12:25,927 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 12 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:25,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 276 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:12:25,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-13 15:12:25,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2022-12-13 15:12:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-12-13 15:12:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2022-12-13 15:12:25,936 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 31 [2022-12-13 15:12:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:25,936 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2022-12-13 15:12:25,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 15:12:25,936 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2022-12-13 15:12:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 15:12:25,937 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:25,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:12:25,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 15:12:25,938 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1854431003, now seen corresponding path program 1 times [2022-12-13 15:12:25,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:25,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453616527] [2022-12-13 15:12:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:25,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:26,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:26,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:26,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:26,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:12:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:26,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:26,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453616527] [2022-12-13 15:12:26,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453616527] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:12:26,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:12:26,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 15:12:26,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064378972] [2022-12-13 15:12:26,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:26,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 15:12:26,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:26,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 15:12:26,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:12:26,912 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 15:12:27,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:27,328 INFO L93 Difference]: Finished difference Result 164 states and 211 transitions. [2022-12-13 15:12:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:12:27,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2022-12-13 15:12:27,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:27,330 INFO L225 Difference]: With dead ends: 164 [2022-12-13 15:12:27,330 INFO L226 Difference]: Without dead ends: 97 [2022-12-13 15:12:27,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-12-13 15:12:27,331 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 64 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:27,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 446 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:12:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-12-13 15:12:27,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2022-12-13 15:12:27,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.293103448275862) internal successors, (75), 61 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 8 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-12-13 15:12:27,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-12-13 15:12:27,340 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 39 [2022-12-13 15:12:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:27,340 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-12-13 15:12:27,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 15:12:27,340 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-12-13 15:12:27,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 15:12:27,341 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:27,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:12:27,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:12:27,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:27,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1596265565, now seen corresponding path program 1 times [2022-12-13 15:12:27,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:27,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282873798] [2022-12-13 15:12:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:27,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:27,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:27,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:27,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:12:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:27,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:27,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282873798] [2022-12-13 15:12:27,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282873798] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:12:27,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:12:27,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 15:12:27,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35743712] [2022-12-13 15:12:27,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:27,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:12:27,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:27,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:12:27,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:12:27,737 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 15:12:28,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:28,126 INFO L93 Difference]: Finished difference Result 182 states and 246 transitions. [2022-12-13 15:12:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:12:28,126 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2022-12-13 15:12:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:28,128 INFO L225 Difference]: With dead ends: 182 [2022-12-13 15:12:28,128 INFO L226 Difference]: Without dead ends: 110 [2022-12-13 15:12:28,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:12:28,129 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 116 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:28,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 451 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:12:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-13 15:12:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2022-12-13 15:12:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 73 states have internal predecessors, (88), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (19), 11 states have call predecessors, (19), 12 states have call successors, (19) [2022-12-13 15:12:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2022-12-13 15:12:28,141 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 39 [2022-12-13 15:12:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:28,141 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2022-12-13 15:12:28,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 15:12:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2022-12-13 15:12:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 15:12:28,142 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:28,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:12:28,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 15:12:28,142 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:28,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:28,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1687584481, now seen corresponding path program 1 times [2022-12-13 15:12:28,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:28,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404568930] [2022-12-13 15:12:28,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:28,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:28,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:28,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:28,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:12:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:28,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:28,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404568930] [2022-12-13 15:12:28,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404568930] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:12:28,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:12:28,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 15:12:28,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984257447] [2022-12-13 15:12:28,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:28,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:12:28,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:28,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:12:28,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:12:28,294 INFO L87 Difference]: Start difference. First operand 91 states and 120 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 15:12:28,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:28,378 INFO L93 Difference]: Finished difference Result 186 states and 249 transitions. [2022-12-13 15:12:28,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:12:28,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-12-13 15:12:28,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:28,379 INFO L225 Difference]: With dead ends: 186 [2022-12-13 15:12:28,379 INFO L226 Difference]: Without dead ends: 94 [2022-12-13 15:12:28,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:12:28,380 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 15 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:28,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 342 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:12:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-13 15:12:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2022-12-13 15:12:28,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.28125) internal successors, (82), 68 states have internal predecessors, (82), 13 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (15), 11 states have call predecessors, (15), 12 states have call successors, (15) [2022-12-13 15:12:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2022-12-13 15:12:28,389 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 39 [2022-12-13 15:12:28,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:28,389 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2022-12-13 15:12:28,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 15:12:28,390 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2022-12-13 15:12:28,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 15:12:28,390 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:28,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:12:28,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 15:12:28,391 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:28,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:28,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1045188466, now seen corresponding path program 1 times [2022-12-13 15:12:28,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:28,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722188241] [2022-12-13 15:12:28,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:28,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:28,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:28,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:28,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:12:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:28,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:28,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722188241] [2022-12-13 15:12:28,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722188241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:12:28,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157702825] [2022-12-13 15:12:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:28,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:12:28,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:12:28,671 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:12:28,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:12:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:28,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 15:12:28,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:12:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:29,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:12:29,408 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 15:12:29,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-12-13 15:12:29,417 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:12:29,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2022-12-13 15:12:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:29,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157702825] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 15:12:29,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:12:29,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 11] total 23 [2022-12-13 15:12:29,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998723844] [2022-12-13 15:12:29,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:29,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:12:29,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:29,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:12:29,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2022-12-13 15:12:29,431 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:12:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:29,614 INFO L93 Difference]: Finished difference Result 183 states and 238 transitions. [2022-12-13 15:12:29,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:12:29,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2022-12-13 15:12:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:29,616 INFO L225 Difference]: With dead ends: 183 [2022-12-13 15:12:29,616 INFO L226 Difference]: Without dead ends: 104 [2022-12-13 15:12:29,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-12-13 15:12:29,617 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 24 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:29,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 374 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:12:29,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-13 15:12:29,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2022-12-13 15:12:29,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 70 states have internal predecessors, (88), 13 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (15), 13 states have call predecessors, (15), 12 states have call successors, (15) [2022-12-13 15:12:29,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 116 transitions. [2022-12-13 15:12:29,626 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 116 transitions. Word has length 41 [2022-12-13 15:12:29,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:29,626 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 116 transitions. [2022-12-13 15:12:29,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:12:29,626 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 116 transitions. [2022-12-13 15:12:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 15:12:29,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:29,627 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 15:12:29,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:12:29,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 15:12:29,829 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:29,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:29,830 INFO L85 PathProgramCache]: Analyzing trace with hash 964483973, now seen corresponding path program 1 times [2022-12-13 15:12:29,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:29,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661077353] [2022-12-13 15:12:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:29,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:30,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:30,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:30,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:12:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:12:30,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:30,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661077353] [2022-12-13 15:12:30,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661077353] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:12:30,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:12:30,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 15:12:30,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402595161] [2022-12-13 15:12:30,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:12:30,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:12:30,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:30,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:12:30,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:12:30,070 INFO L87 Difference]: Start difference. First operand 90 states and 116 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:12:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:12:30,134 INFO L93 Difference]: Finished difference Result 106 states and 133 transitions. [2022-12-13 15:12:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:12:30,135 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-12-13 15:12:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:12:30,136 INFO L225 Difference]: With dead ends: 106 [2022-12-13 15:12:30,136 INFO L226 Difference]: Without dead ends: 104 [2022-12-13 15:12:30,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:12:30,136 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:12:30,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 445 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:12:30,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-13 15:12:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-12-13 15:12:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 77 states have internal predecessors, (94), 14 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2022-12-13 15:12:30,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2022-12-13 15:12:30,146 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 42 [2022-12-13 15:12:30,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:12:30,146 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2022-12-13 15:12:30,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 15:12:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2022-12-13 15:12:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 15:12:30,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:12:30,147 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 15:12:30,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 15:12:30,147 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:12:30,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:12:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1440497479, now seen corresponding path program 1 times [2022-12-13 15:12:30,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:12:30,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529954647] [2022-12-13 15:12:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:30,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:12:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:30,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:12:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:30,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:12:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:30,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:12:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:30,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 15:12:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 15:12:30,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:12:30,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529954647] [2022-12-13 15:12:30,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529954647] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:12:30,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111796071] [2022-12-13 15:12:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:12:30,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:12:30,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:12:30,678 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:12:30,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:12:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:12:30,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 15:12:30,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:12:30,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:12:30,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:12:30,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:12:30,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-12-13 15:12:30,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:12:30,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:12:30,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:12:30,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-12-13 15:12:53,269 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:12:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:12:53,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:12:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 15:12:53,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111796071] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:12:53,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:12:53,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 8] total 24 [2022-12-13 15:12:53,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226502283] [2022-12-13 15:12:53,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:12:53,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:12:53,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:12:53,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:12:53,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=459, Unknown=6, NotChecked=0, Total=552 [2022-12-13 15:12:53,832 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand has 24 states, 20 states have (on average 4.15) internal successors, (83), 23 states have internal predecessors, (83), 12 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 15:13:03,979 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:13:14,051 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:13:24,096 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:13:34,181 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:13:44,328 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:13:44,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:13:44,426 INFO L93 Difference]: Finished difference Result 227 states and 293 transitions. [2022-12-13 15:13:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:13:44,427 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 4.15) internal successors, (83), 23 states have internal predecessors, (83), 12 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) Word has length 50 [2022-12-13 15:13:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:13:44,427 INFO L225 Difference]: With dead ends: 227 [2022-12-13 15:13:44,427 INFO L226 Difference]: Without dead ends: 135 [2022-12-13 15:13:44,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 72.8s TimeCoverageRelationStatistics Valid=190, Invalid=860, Unknown=6, NotChecked=0, Total=1056 [2022-12-13 15:13:44,428 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 168 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:13:44,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 492 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:13:44,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-13 15:13:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 94. [2022-12-13 15:13:44,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 74 states have internal predecessors, (88), 12 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-13 15:13:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2022-12-13 15:13:44,439 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 50 [2022-12-13 15:13:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:13:44,440 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2022-12-13 15:13:44,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 4.15) internal successors, (83), 23 states have internal predecessors, (83), 12 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 15:13:44,440 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2022-12-13 15:13:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 15:13:44,440 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:13:44,440 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 15:13:44,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:13:44,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:13:44,642 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:13:44,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:13:44,643 INFO L85 PathProgramCache]: Analyzing trace with hash -41969126, now seen corresponding path program 1 times [2022-12-13 15:13:44,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:13:44,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633162171] [2022-12-13 15:13:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:13:44,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:13:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:44,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:13:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:44,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:13:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:44,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:13:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:44,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 15:13:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:45,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 15:13:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:45,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:13:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:13:45,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:13:45,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633162171] [2022-12-13 15:13:45,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633162171] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:13:45,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:13:45,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 15:13:45,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746904696] [2022-12-13 15:13:45,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:13:45,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 15:13:45,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:13:45,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 15:13:45,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:13:45,073 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-13 15:13:45,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:13:45,230 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2022-12-13 15:13:45,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:13:45,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2022-12-13 15:13:45,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:13:45,231 INFO L225 Difference]: With dead ends: 100 [2022-12-13 15:13:45,231 INFO L226 Difference]: Without dead ends: 96 [2022-12-13 15:13:45,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:13:45,232 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 14 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:13:45,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 502 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:13:45,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-13 15:13:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-12-13 15:13:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 75 states have internal predecessors, (89), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-13 15:13:45,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2022-12-13 15:13:45,247 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 58 [2022-12-13 15:13:45,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:13:45,247 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2022-12-13 15:13:45,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-13 15:13:45,247 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2022-12-13 15:13:45,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 15:13:45,248 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:13:45,248 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-13 15:13:45,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 15:13:45,249 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:13:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:13:45,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1239716043, now seen corresponding path program 1 times [2022-12-13 15:13:45,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:13:45,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346401749] [2022-12-13 15:13:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:13:45,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:13:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:45,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:13:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:45,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:13:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:45,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:13:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:45,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:13:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:45,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 15:13:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:45,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 15:13:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:45,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:13:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:46,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 15:13:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:46,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 15:13:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 15:13:46,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:13:46,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346401749] [2022-12-13 15:13:46,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346401749] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:13:46,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:13:46,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 15:13:46,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279171950] [2022-12-13 15:13:46,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:13:46,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 15:13:46,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:13:46,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 15:13:46,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:13:46,214 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand has 15 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 8 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-13 15:13:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:13:46,707 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2022-12-13 15:13:46,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 15:13:46,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 8 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 78 [2022-12-13 15:13:46,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:13:46,708 INFO L225 Difference]: With dead ends: 105 [2022-12-13 15:13:46,708 INFO L226 Difference]: Without dead ends: 98 [2022-12-13 15:13:46,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-12-13 15:13:46,709 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:13:46,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 72 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:13:46,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-13 15:13:46,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-12-13 15:13:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.2) internal successors, (90), 77 states have internal predecessors, (90), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-12-13 15:13:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2022-12-13 15:13:46,723 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 78 [2022-12-13 15:13:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:13:46,723 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2022-12-13 15:13:46,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 8 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-13 15:13:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2022-12-13 15:13:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 15:13:46,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:13:46,724 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-13 15:13:46,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 15:13:46,724 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:13:46,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:13:46,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2049062669, now seen corresponding path program 1 times [2022-12-13 15:13:46,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:13:46,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829028681] [2022-12-13 15:13:46,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:13:46,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:13:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:47,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:13:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:47,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:13:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:47,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:13:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:47,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:13:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:47,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 15:13:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:47,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 15:13:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:47,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:13:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:47,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 15:13:47,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:47,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 15:13:47,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 15:13:48,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:13:48,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829028681] [2022-12-13 15:13:48,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829028681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:13:48,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770411495] [2022-12-13 15:13:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:13:48,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:13:48,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:13:48,189 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:13:48,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:13:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:13:48,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 15:13:48,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:13:50,496 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_6| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_6|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_5| 24)) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_6| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_6|) (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_5| 24)) 0)))) is different from true [2022-12-13 15:13:52,632 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_3| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_3|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_3| 24)) 0))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_3| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_3| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_3|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_3| 24)) 0)))) is different from true [2022-12-13 15:13:54,726 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_4| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_4| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_4|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_4| 24)) 0))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_4| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_4| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_4|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_4| 24)) 0)))) is different from true [2022-12-13 15:13:56,825 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_5| 24)) 0))) (exists ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_5| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_5|) (+ |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_5| 24)) 0)))) is different from true [2022-12-13 15:13:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2022-12-13 15:13:57,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:13:57,948 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 15:13:57,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-13 15:13:57,956 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:13:57,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-12-13 15:13:58,094 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 15:13:58,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-13 15:13:58,103 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:13:58,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-12-13 15:13:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 15:13:58,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770411495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:13:58,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:13:58,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 13] total 42 [2022-12-13 15:13:58,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193505897] [2022-12-13 15:13:58,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:13:58,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 15:13:58,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:13:58,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 15:13:58,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1290, Unknown=4, NotChecked=300, Total=1722 [2022-12-13 15:13:58,125 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand has 42 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 12 states have call successors, (24), 8 states have call predecessors, (24), 13 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2022-12-13 15:14:00,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 15:15:28,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:15:28,814 INFO L93 Difference]: Finished difference Result 243 states and 301 transitions. [2022-12-13 15:15:28,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 15:15:28,814 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 12 states have call successors, (24), 8 states have call predecessors, (24), 13 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) Word has length 78 [2022-12-13 15:15:28,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:15:28,815 INFO L225 Difference]: With dead ends: 243 [2022-12-13 15:15:28,816 INFO L226 Difference]: Without dead ends: 150 [2022-12-13 15:15:28,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 144 SyntacticMatches, 10 SemanticMatches, 77 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 96.5s TimeCoverageRelationStatistics Valid=662, Invalid=4886, Unknown=18, NotChecked=596, Total=6162 [2022-12-13 15:15:28,818 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 366 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 127 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 428 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:15:28,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 133 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2100 Invalid, 1 Unknown, 428 Unchecked, 3.4s Time] [2022-12-13 15:15:28,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-12-13 15:15:28,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 115. [2022-12-13 15:15:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 91 states have (on average 1.1318681318681318) internal successors, (103), 92 states have internal predecessors, (103), 12 states have call successors, (12), 11 states have call predecessors, (12), 11 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-12-13 15:15:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2022-12-13 15:15:28,834 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 78 [2022-12-13 15:15:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:15:28,834 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2022-12-13 15:15:28,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 12 states have call successors, (24), 8 states have call predecessors, (24), 13 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2022-12-13 15:15:28,834 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2022-12-13 15:15:28,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 15:15:28,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:15:28,834 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-13 15:15:28,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:15:29,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 15:15:29,036 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:15:29,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:15:29,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1852877617, now seen corresponding path program 1 times [2022-12-13 15:15:29,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:15:29,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186896060] [2022-12-13 15:15:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:15:29,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:15:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:29,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:15:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:29,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:15:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:29,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:15:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:29,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:15:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:29,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 15:15:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:29,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 15:15:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:29,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:15:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:29,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 15:15:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:29,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 15:15:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 15:15:29,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:15:29,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186896060] [2022-12-13 15:15:29,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186896060] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:15:29,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420506595] [2022-12-13 15:15:29,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:15:29,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:15:29,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:15:29,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:15:29,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:15:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:29,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 15:15:30,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:15:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:15:30,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:15:31,345 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 15:15:31,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-13 15:15:31,352 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:15:31,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-12-13 15:15:31,466 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-13 15:15:31,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-13 15:15:31,473 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-13 15:15:31,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-12-13 15:15:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 15:15:31,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420506595] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:15:31,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:15:31,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 13] total 35 [2022-12-13 15:15:31,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266406288] [2022-12-13 15:15:31,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:15:31,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 15:15:31,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:15:31,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 15:15:31,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 15:15:31,488 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 35 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 11 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2022-12-13 15:15:32,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:15:32,890 INFO L93 Difference]: Finished difference Result 145 states and 162 transitions. [2022-12-13 15:15:32,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 15:15:32,890 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 11 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) Word has length 78 [2022-12-13 15:15:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:15:32,891 INFO L225 Difference]: With dead ends: 145 [2022-12-13 15:15:32,891 INFO L226 Difference]: Without dead ends: 112 [2022-12-13 15:15:32,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 144 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=333, Invalid=1923, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 15:15:32,891 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 254 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 15:15:32,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 114 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 15:15:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-13 15:15:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-12-13 15:15:32,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 88 states have (on average 1.1022727272727273) internal successors, (97), 89 states have internal predecessors, (97), 12 states have call successors, (12), 11 states have call predecessors, (12), 11 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-12-13 15:15:32,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2022-12-13 15:15:32,907 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 78 [2022-12-13 15:15:32,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:15:32,907 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2022-12-13 15:15:32,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 11 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2022-12-13 15:15:32,907 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2022-12-13 15:15:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 15:15:32,908 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:15:32,908 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:15:32,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 15:15:33,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:15:33,110 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:15:33,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:15:33,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2111043055, now seen corresponding path program 1 times [2022-12-13 15:15:33,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:15:33,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543090576] [2022-12-13 15:15:33,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:15:33,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:15:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:33,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:15:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:33,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:15:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:33,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:15:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:33,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:15:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:33,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 15:15:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:33,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 15:15:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:33,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:15:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:33,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 15:15:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:33,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 15:15:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 15:15:33,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:15:33,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543090576] [2022-12-13 15:15:33,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543090576] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:15:33,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:15:33,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 15:15:33,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380269648] [2022-12-13 15:15:33,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:15:33,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:15:33,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:15:33,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:15:33,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:15:33,493 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand has 12 states, 9 states have (on average 5.777777777777778) internal successors, (52), 10 states have internal predecessors, (52), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-13 15:15:33,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:15:33,799 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2022-12-13 15:15:33,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:15:33,799 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 5.777777777777778) internal successors, (52), 10 states have internal predecessors, (52), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 78 [2022-12-13 15:15:33,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:15:33,799 INFO L225 Difference]: With dead ends: 127 [2022-12-13 15:15:33,799 INFO L226 Difference]: Without dead ends: 101 [2022-12-13 15:15:33,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:15:33,800 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 90 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:15:33,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 60 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:15:33,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-13 15:15:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-12-13 15:15:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 78 states have internal predecessors, (82), 12 states have call successors, (12), 11 states have call predecessors, (12), 11 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-12-13 15:15:33,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2022-12-13 15:15:33,813 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 78 [2022-12-13 15:15:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:15:33,814 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2022-12-13 15:15:33,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 5.777777777777778) internal successors, (52), 10 states have internal predecessors, (52), 7 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-13 15:15:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2022-12-13 15:15:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-13 15:15:33,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:15:33,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:15:33,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 15:15:33,815 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:15:33,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:15:33,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1310004315, now seen corresponding path program 1 times [2022-12-13 15:15:33,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:15:33,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836632586] [2022-12-13 15:15:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:15:33,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:15:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:34,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:15:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:34,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:15:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:34,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:15:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:34,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:15:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:34,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 15:15:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:34,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 15:15:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:34,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:15:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:34,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 15:15:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:34,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 15:15:34,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:35,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:15:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 15:15:35,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:15:35,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836632586] [2022-12-13 15:15:35,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836632586] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:15:35,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605593741] [2022-12-13 15:15:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:15:35,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:15:35,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:15:35,269 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:15:35,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:15:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:15:35,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 119 conjunts are in the unsatisfiable core [2022-12-13 15:15:35,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:15:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:15:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:15:35,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:15:35,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-12-13 15:15:35,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:15:35,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:15:35,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:15:35,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-12-13 15:15:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 15:15:38,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:15:49,521 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:15:51,550 WARN L837 $PredicateComparison]: unable to prove that (or (and (forall ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_28| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_28| Int)) (= |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_28| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_28|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_28|)) (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_28|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_28|))))) (forall ((|v_aws_linked_list_init_#in~list.base_BEFORE_CALL_28| Int) (|v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_28| Int)) (= |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_28| (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_28|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_28|)) (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_init_#in~list.base_BEFORE_CALL_28|) |v_aws_linked_list_init_#in~list.offset_BEFORE_CALL_28|)))))) (not (= (mod |c___VERIFIER_assert_#in~cond| 256) 0)) (= (mod c___VERIFIER_assert_~cond 256) 0)) is different from false [2022-12-13 15:16:24,740 WARN L233 SmtUtils]: Spent 12.04s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:16:41,991 WARN L233 SmtUtils]: Spent 12.05s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:16:54,200 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:17:04,357 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:17:14,572 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:17:14,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605593741] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:17:14,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:17:14,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 29] total 44 [2022-12-13 15:17:14,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904204973] [2022-12-13 15:17:14,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:17:14,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 15:17:14,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:17:14,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 15:17:14,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=3058, Unknown=7, NotChecked=112, Total=3422 [2022-12-13 15:17:14,609 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 44 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 36 states have internal predecessors, (111), 14 states have call successors, (19), 6 states have call predecessors, (19), 13 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2022-12-13 15:17:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:17:24,106 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2022-12-13 15:17:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-13 15:17:24,107 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 36 states have internal predecessors, (111), 14 states have call successors, (19), 6 states have call predecessors, (19), 13 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) Word has length 91 [2022-12-13 15:17:24,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:17:24,107 INFO L225 Difference]: With dead ends: 128 [2022-12-13 15:17:24,107 INFO L226 Difference]: Without dead ends: 119 [2022-12-13 15:17:24,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 103.6s TimeCoverageRelationStatistics Valid=953, Invalid=8549, Unknown=8, NotChecked=192, Total=9702 [2022-12-13 15:17:24,110 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 236 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:17:24,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 169 Invalid, 2577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-13 15:17:24,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-12-13 15:17:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2022-12-13 15:17:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 81 states have internal predecessors, (87), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2022-12-13 15:17:24,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2022-12-13 15:17:24,136 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 91 [2022-12-13 15:17:24,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:17:24,136 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2022-12-13 15:17:24,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 36 states have internal predecessors, (111), 14 states have call successors, (19), 6 states have call predecessors, (19), 13 states have return successors, (19), 13 states have call predecessors, (19), 13 states have call successors, (19) [2022-12-13 15:17:24,136 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2022-12-13 15:17:24,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-13 15:17:24,137 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:17:24,137 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:17:24,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 15:17:24,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 15:17:24,339 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:17:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:17:24,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1896059343, now seen corresponding path program 1 times [2022-12-13 15:17:24,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:17:24,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558586025] [2022-12-13 15:17:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:17:24,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:17:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:24,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:17:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:24,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:17:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:24,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:17:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:24,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:17:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:24,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 15:17:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:24,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 15:17:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:24,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:17:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:24,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 15:17:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:24,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 15:17:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:24,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:17:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-13 15:17:24,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:17:24,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558586025] [2022-12-13 15:17:24,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558586025] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:17:24,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:17:24,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 15:17:24,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072274063] [2022-12-13 15:17:24,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:17:24,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 15:17:24,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:17:24,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 15:17:24,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:17:24,557 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-13 15:17:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:17:24,863 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-12-13 15:17:24,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:17:24,864 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 94 [2022-12-13 15:17:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:17:24,865 INFO L225 Difference]: With dead ends: 115 [2022-12-13 15:17:24,865 INFO L226 Difference]: Without dead ends: 106 [2022-12-13 15:17:24,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:17:24,866 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:17:24,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 106 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:17:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-13 15:17:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-12-13 15:17:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 82 states have (on average 1.048780487804878) internal successors, (86), 81 states have internal predecessors, (86), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2022-12-13 15:17:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-12-13 15:17:24,893 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 94 [2022-12-13 15:17:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:17:24,893 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-12-13 15:17:24,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-12-13 15:17:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-12-13 15:17:24,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-12-13 15:17:24,894 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:17:24,894 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-13 15:17:24,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 15:17:24,894 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:17:24,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:17:24,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1936209007, now seen corresponding path program 2 times [2022-12-13 15:17:24,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:17:24,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311988132] [2022-12-13 15:17:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:17:24,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:17:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:25,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 15:17:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:25,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:17:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:25,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 15:17:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:25,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:17:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:25,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 15:17:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:25,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 15:17:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:25,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:17:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:25,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 15:17:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:25,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 15:17:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:25,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:17:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:25,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 15:17:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:17:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-13 15:17:26,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:17:26,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311988132] [2022-12-13 15:17:26,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311988132] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:17:26,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041032812] [2022-12-13 15:17:26,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:17:26,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:17:26,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:17:26,086 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:17:26,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:17:26,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:17:26,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:17:26,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-13 15:17:26,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:17:26,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:17:26,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:17:26,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:17:26,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-12-13 15:17:26,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:17:26,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:17:26,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:17:26,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-12-13 15:17:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 38 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 15:17:33,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:17:48,824 WARN L233 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:17:59,024 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:18:07,270 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:18:07,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041032812] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:18:07,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:18:07,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 41 [2022-12-13 15:18:07,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622233035] [2022-12-13 15:18:07,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:18:07,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 15:18:07,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:07,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 15:18:07,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=2521, Unknown=3, NotChecked=0, Total=2756 [2022-12-13 15:18:07,293 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 41 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 38 states have internal predecessors, (127), 18 states have call successors, (22), 6 states have call predecessors, (22), 12 states have return successors, (21), 15 states have call predecessors, (21), 17 states have call successors, (21) [2022-12-13 15:18:11,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:11,110 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2022-12-13 15:18:11,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 15:18:11,111 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 38 states have internal predecessors, (127), 18 states have call successors, (22), 6 states have call predecessors, (22), 12 states have return successors, (21), 15 states have call predecessors, (21), 17 states have call successors, (21) Word has length 102 [2022-12-13 15:18:11,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:11,111 INFO L225 Difference]: With dead ends: 111 [2022-12-13 15:18:11,111 INFO L226 Difference]: Without dead ends: 0 [2022-12-13 15:18:11,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 158 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=651, Invalid=5198, Unknown=3, NotChecked=0, Total=5852 [2022-12-13 15:18:11,113 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 149 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 1671 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:11,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 146 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1671 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-13 15:18:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-13 15:18:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-13 15:18:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:11,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-13 15:18:11,113 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 102 [2022-12-13 15:18:11,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:11,113 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 15:18:11,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 3.5277777777777777) internal successors, (127), 38 states have internal predecessors, (127), 18 states have call successors, (22), 6 states have call predecessors, (22), 12 states have return successors, (21), 15 states have call predecessors, (21), 17 states have call successors, (21) [2022-12-13 15:18:11,113 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-13 15:18:11,114 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-13 15:18:11,115 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-13 15:18:11,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 15:18:11,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027dff90-90c2-445d-b7a1-666288f02da8/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 15:18:11,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-13 15:20:03,843 WARN L233 SmtUtils]: Spent 1.83m on a formula simplification. DAG size of input: 256 DAG size of output: 256 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-12-13 15:25:55,677 WARN L233 SmtUtils]: Spent 5.86m on a formula simplification. DAG size of input: 281 DAG size of output: 276 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-12-13 15:26:03,769 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 87 DAG size of output: 59 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-12-13 15:26:27,245 WARN L233 SmtUtils]: Spent 23.47s on a formula simplification. DAG size of input: 354 DAG size of output: 88 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-12-13 15:26:35,373 WARN L233 SmtUtils]: Spent 8.13s on a formula simplification. DAG size of input: 117 DAG size of output: 83 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-12-13 15:26:45,433 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification. DAG size of input: 201 DAG size of output: 1 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)