./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 20:29:46,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:29:46,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:29:46,052 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:29:46,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:29:46,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:29:46,055 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:29:46,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:29:46,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:29:46,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:29:46,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:29:46,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:29:46,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:29:46,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:29:46,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:29:46,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:29:46,086 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:29:46,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:29:46,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:29:46,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:29:46,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:29:46,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:29:46,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:29:46,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:29:46,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:29:46,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:29:46,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:29:46,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:29:46,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:29:46,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:29:46,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:29:46,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:29:46,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:29:46,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:29:46,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:29:46,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:29:46,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:29:46,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:29:46,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:29:46,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:29:46,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:29:46,137 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:29:46,184 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:29:46,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:29:46,189 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:29:46,190 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:29:46,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:29:46,192 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:29:46,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:29:46,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:29:46,193 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:29:46,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:29:46,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:29:46,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:29:46,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:29:46,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:29:46,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:29:46,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:29:46,196 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:29:46,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:29:46,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:29:46,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:29:46,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:29:46,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:29:46,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:29:46,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:29:46,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:29:46,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:29:46,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:29:46,201 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:29:46,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:29:46,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:29:46,202 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 [2022-11-02 20:29:46,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:29:46,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:29:46,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:29:46,623 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:29:46,624 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:29:46,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2022-11-02 20:29:46,744 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/data/e15b2d260/4b99b5da9c9c437282dc3591779b1b14/FLAGff9957512 [2022-11-02 20:29:47,653 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:29:47,654 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2022-11-02 20:29:47,688 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/data/e15b2d260/4b99b5da9c9c437282dc3591779b1b14/FLAGff9957512 [2022-11-02 20:29:47,723 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/data/e15b2d260/4b99b5da9c9c437282dc3591779b1b14 [2022-11-02 20:29:47,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:29:47,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:29:47,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:29:47,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:29:47,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:29:47,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:29:47" (1/1) ... [2022-11-02 20:29:47,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e05c458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:29:47, skipping insertion in model container [2022-11-02 20:29:47,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:29:47" (1/1) ... [2022-11-02 20:29:47,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:29:47,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:29:48,225 WARN L230 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_fa1193ee-3064-4be7-8c62-db429ca2f956/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2022-11-02 20:29:48,233 WARN L230 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_fa1193ee-3064-4be7-8c62-db429ca2f956/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2022-11-02 20:29:49,360 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 20:29:49,472 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:49,473 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:49,473 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:49,474 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:49,476 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:49,492 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:49,493 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:49,495 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:49,496 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:49,498 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:49,499 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:49,500 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:49,501 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,044 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 20:29:50,051 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 20:29:50,052 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 20:29:50,054 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 20:29:50,056 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 20:29:50,057 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 20:29:50,057 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 20:29:50,058 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 20:29:50,059 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 20:29:50,060 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 20:29:50,233 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,248 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:29:50,370 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:29:50,387 WARN L230 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_fa1193ee-3064-4be7-8c62-db429ca2f956/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2022-11-02 20:29:50,388 WARN L230 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_fa1193ee-3064-4be7-8c62-db429ca2f956/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2022-11-02 20:29:50,477 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-02 20:29:50,503 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,503 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,504 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,505 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,506 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,515 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,516 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,517 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,518 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,519 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,520 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,521 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,521 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,563 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-02 20:29:50,564 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-02 20:29:50,565 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-02 20:29:50,566 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-02 20:29:50,568 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-02 20:29:50,568 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-02 20:29:50,569 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-02 20:29:50,570 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-02 20:29:50,571 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-02 20:29:50,572 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-02 20:29:50,595 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,601 WARN L1543 CHandler]: Possible shadowing of function index [2022-11-02 20:29:50,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:29:50,988 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:29:50,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:29:50 WrapperNode [2022-11-02 20:29:50,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:29:50,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:29:50,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:29:50,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:29:51,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:29:50" (1/1) ... [2022-11-02 20:29:51,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:29:50" (1/1) ... [2022-11-02 20:29:51,222 INFO L138 Inliner]: procedures = 690, calls = 1553, calls flagged for inlining = 48, calls inlined = 7, statements flattened = 577 [2022-11-02 20:29:51,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:29:51,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:29:51,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:29:51,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:29:51,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:29:50" (1/1) ... [2022-11-02 20:29:51,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:29:50" (1/1) ... [2022-11-02 20:29:51,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:29:50" (1/1) ... [2022-11-02 20:29:51,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:29:50" (1/1) ... [2022-11-02 20:29:51,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:29:50" (1/1) ... [2022-11-02 20:29:51,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:29:50" (1/1) ... [2022-11-02 20:29:51,331 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:29:50" (1/1) ... [2022-11-02 20:29:51,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:29:50" (1/1) ... [2022-11-02 20:29:51,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:29:51,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:29:51,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:29:51,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:29:51,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:29:50" (1/1) ... [2022-11-02 20:29:51,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:29:51,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:29:51,423 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:29:51,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:29:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-11-02 20:29:51,490 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-11-02 20:29:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:29:51,492 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2022-11-02 20:29:51,492 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2022-11-02 20:29:51,493 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-11-02 20:29:51,494 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-11-02 20:29:51,494 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-02 20:29:51,495 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-02 20:29:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:29:51,495 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-02 20:29:51,496 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-02 20:29:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:29:51,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:29:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:29:51,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:29:51,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:29:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:29:51,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:29:51,498 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-02 20:29:51,498 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-02 20:29:51,499 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-11-02 20:29:51,499 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-11-02 20:29:51,500 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-11-02 20:29:51,500 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-11-02 20:29:51,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-02 20:29:51,502 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-02 20:29:51,502 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:29:51,503 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:29:51,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:29:51,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:29:51,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:29:51,504 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-02 20:29:51,504 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-02 20:29:51,504 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-11-02 20:29:51,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-11-02 20:29:51,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:29:51,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:29:52,018 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:29:52,020 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:29:53,154 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:29:53,170 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:29:53,170 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 20:29:53,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:29:53 BoogieIcfgContainer [2022-11-02 20:29:53,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:29:53,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:29:53,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:29:53,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:29:53,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:29:47" (1/3) ... [2022-11-02 20:29:53,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e26585e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:29:53, skipping insertion in model container [2022-11-02 20:29:53,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:29:50" (2/3) ... [2022-11-02 20:29:53,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e26585e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:29:53, skipping insertion in model container [2022-11-02 20:29:53,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:29:53" (3/3) ... [2022-11-02 20:29:53,192 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_list_clean_up_harness.i [2022-11-02 20:29:53,215 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:29:53,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:29:53,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:29:53,322 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;@31302df4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:29:53,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:29:53,328 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-02 20:29:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 20:29:53,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:53,349 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:53,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:53,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1460968734, now seen corresponding path program 1 times [2022-11-02 20:29:53,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:53,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090062321] [2022-11-02 20:29:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:53,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:54,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:29:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:54,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:29:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:54,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 20:29:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:54,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:29:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:54,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:29:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:54,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:29:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:54,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:29:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:54,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:29:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:54,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-02 20:29:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 20:29:54,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:54,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090062321] [2022-11-02 20:29:54,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090062321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:29:54,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:29:54,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:29:54,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964789450] [2022-11-02 20:29:54,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:29:54,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:29:54,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:54,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:29:54,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:29:54,471 INFO L87 Difference]: Start difference. First operand has 114 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-02 20:29:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:54,842 INFO L93 Difference]: Finished difference Result 228 states and 297 transitions. [2022-11-02 20:29:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:29:54,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2022-11-02 20:29:54,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:54,857 INFO L225 Difference]: With dead ends: 228 [2022-11-02 20:29:54,857 INFO L226 Difference]: Without dead ends: 114 [2022-11-02 20:29:54,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:29:54,866 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 35 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:54,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 162 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:29:54,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-02 20:29:54,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-11-02 20:29:54,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-02 20:29:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2022-11-02 20:29:54,938 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 65 [2022-11-02 20:29:54,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:54,939 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2022-11-02 20:29:54,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-02 20:29:54,940 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2022-11-02 20:29:54,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:29:54,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:54,944 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:54,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:29:54,944 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:54,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:54,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1894775411, now seen corresponding path program 1 times [2022-11-02 20:29:54,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:54,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626733154] [2022-11-02 20:29:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:54,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:55,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:29:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:55,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:29:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:55,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 20:29:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:55,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-02 20:29:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:55,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:29:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:55,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:29:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:55,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:29:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:55,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 20:29:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:55,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-02 20:29:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:55,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-02 20:29:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 20:29:55,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:55,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626733154] [2022-11-02 20:29:55,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626733154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:29:55,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:29:55,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:29:55,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745491067] [2022-11-02 20:29:55,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:29:55,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:29:55,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:55,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:29:55,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:29:55,816 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-02 20:29:56,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:56,630 INFO L93 Difference]: Finished difference Result 199 states and 243 transitions. [2022-11-02 20:29:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:29:56,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 71 [2022-11-02 20:29:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:56,633 INFO L225 Difference]: With dead ends: 199 [2022-11-02 20:29:56,634 INFO L226 Difference]: Without dead ends: 126 [2022-11-02 20:29:56,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:29:56,636 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 88 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:56,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 322 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:29:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-02 20:29:56,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2022-11-02 20:29:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 74 states have internal predecessors, (88), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-11-02 20:29:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2022-11-02 20:29:56,659 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 71 [2022-11-02 20:29:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:56,659 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2022-11-02 20:29:56,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-02 20:29:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2022-11-02 20:29:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-02 20:29:56,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:56,664 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:56,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:29:56,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:56,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:56,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1692678563, now seen corresponding path program 1 times [2022-11-02 20:29:56,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:56,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071406433] [2022-11-02 20:29:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:56,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:56,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:29:56,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106920091] [2022-11-02 20:29:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:56,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:56,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:29:56,774 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:29:56,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:29:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:57,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 2123 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:29:57,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:29:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 20:29:57,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:29:57,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:57,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071406433] [2022-11-02 20:29:57,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:29:57,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106920091] [2022-11-02 20:29:57,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106920091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:29:57,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:29:57,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:29:57,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496803109] [2022-11-02 20:29:57,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:29:57,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:29:57,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:57,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:29:57,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:29:57,576 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-02 20:29:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:57,679 INFO L93 Difference]: Finished difference Result 190 states and 229 transitions. [2022-11-02 20:29:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:29:57,680 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 86 [2022-11-02 20:29:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:57,688 INFO L225 Difference]: With dead ends: 190 [2022-11-02 20:29:57,688 INFO L226 Difference]: Without dead ends: 117 [2022-11-02 20:29:57,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:29:57,694 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 4 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:57,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 877 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:29:57,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-02 20:29:57,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2022-11-02 20:29:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-11-02 20:29:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2022-11-02 20:29:57,728 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 86 [2022-11-02 20:29:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:57,729 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2022-11-02 20:29:57,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-02 20:29:57,730 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2022-11-02 20:29:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-02 20:29:57,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:57,740 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:57,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:29:57,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:57,955 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:57,955 INFO L85 PathProgramCache]: Analyzing trace with hash -124616364, now seen corresponding path program 1 times [2022-11-02 20:29:57,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:57,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743906630] [2022-11-02 20:29:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:57,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:58,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:29:58,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483494143] [2022-11-02 20:29:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:58,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:58,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:29:58,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:29:58,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:29:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:58,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 2126 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:29:58,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:29:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 20:29:58,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:29:58,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:58,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743906630] [2022-11-02 20:29:58,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:29:58,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483494143] [2022-11-02 20:29:58,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483494143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:29:58,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:29:58,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:29:58,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082238169] [2022-11-02 20:29:58,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:29:58,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:29:58,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:58,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:29:58,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:29:58,691 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 20:29:58,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:58,724 INFO L93 Difference]: Finished difference Result 134 states and 158 transitions. [2022-11-02 20:29:58,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:29:58,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2022-11-02 20:29:58,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:58,727 INFO L225 Difference]: With dead ends: 134 [2022-11-02 20:29:58,727 INFO L226 Difference]: Without dead ends: 114 [2022-11-02 20:29:58,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:29:58,729 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 2 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:58,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 382 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:29:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-02 20:29:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-11-02 20:29:58,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 78 states have internal predecessors, (92), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-11-02 20:29:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-11-02 20:29:58,745 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 86 [2022-11-02 20:29:58,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:58,746 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-11-02 20:29:58,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 20:29:58,746 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-11-02 20:29:58,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-02 20:29:58,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:58,748 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:58,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:29:58,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:58,974 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:29:58,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:29:58,975 INFO L85 PathProgramCache]: Analyzing trace with hash -117447722, now seen corresponding path program 1 times [2022-11-02 20:29:58,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:29:58,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198693364] [2022-11-02 20:29:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:58,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:29:59,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:29:59,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656698523] [2022-11-02 20:29:59,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:29:59,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:29:59,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:29:59,125 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:29:59,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:29:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:29:59,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 2145 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 20:29:59,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:29:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 20:29:59,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:29:59,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:29:59,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198693364] [2022-11-02 20:29:59,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:29:59,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656698523] [2022-11-02 20:29:59,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656698523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:29:59,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:29:59,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:29:59,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498547283] [2022-11-02 20:29:59,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:29:59,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:29:59,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:29:59,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:29:59,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:29:59,751 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 20:29:59,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:29:59,806 INFO L93 Difference]: Finished difference Result 166 states and 198 transitions. [2022-11-02 20:29:59,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:29:59,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 87 [2022-11-02 20:29:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:29:59,811 INFO L225 Difference]: With dead ends: 166 [2022-11-02 20:29:59,812 INFO L226 Difference]: Without dead ends: 119 [2022-11-02 20:29:59,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:29:59,814 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:29:59,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 370 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:29:59,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-02 20:29:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2022-11-02 20:29:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.1923076923076923) internal successors, (93), 79 states have internal predecessors, (93), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-11-02 20:29:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2022-11-02 20:29:59,845 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 87 [2022-11-02 20:29:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:29:59,846 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2022-11-02 20:29:59,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 20:29:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2022-11-02 20:29:59,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-02 20:29:59,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:29:59,855 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:29:59,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:00,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:00,071 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:00,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:00,071 INFO L85 PathProgramCache]: Analyzing trace with hash 995990719, now seen corresponding path program 1 times [2022-11-02 20:30:00,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:00,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540068118] [2022-11-02 20:30:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:00,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:00,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:30:00,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279550978] [2022-11-02 20:30:00,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:00,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:00,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:00,153 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:00,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:30:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:00,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 2148 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:30:00,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 20:30:00,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:30:00,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:00,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540068118] [2022-11-02 20:30:00,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:30:00,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279550978] [2022-11-02 20:30:00,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279550978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:00,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:00,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:30:00,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429457942] [2022-11-02 20:30:00,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:00,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:30:00,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:00,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:30:00,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:30:00,967 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 20:30:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:01,026 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2022-11-02 20:30:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:30:01,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 87 [2022-11-02 20:30:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:01,030 INFO L225 Difference]: With dead ends: 160 [2022-11-02 20:30:01,030 INFO L226 Difference]: Without dead ends: 117 [2022-11-02 20:30:01,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:30:01,034 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 4 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:01,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 506 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:30:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-02 20:30:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2022-11-02 20:30:01,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 79 states have internal predecessors, (92), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2022-11-02 20:30:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 137 transitions. [2022-11-02 20:30:01,058 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 137 transitions. Word has length 87 [2022-11-02 20:30:01,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:01,059 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 137 transitions. [2022-11-02 20:30:01,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-02 20:30:01,059 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 137 transitions. [2022-11-02 20:30:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 20:30:01,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:01,061 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:01,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:01,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:01,283 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:01,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:01,284 INFO L85 PathProgramCache]: Analyzing trace with hash -462422751, now seen corresponding path program 1 times [2022-11-02 20:30:01,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:01,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627738289] [2022-11-02 20:30:01,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:01,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:01,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:30:01,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320980994] [2022-11-02 20:30:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:01,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:01,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:01,366 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:01,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:30:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:02,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 2152 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-02 20:30:02,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:04,077 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_#Ultimate.C_memset_#t~loopctr731_5| Int) (|#Ultimate.C_memset_#ptr.offset| Int)) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| (store (select |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base|) (+ |#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr731_5|) |c_#Ultimate.C_memset_#value|)) |c_#memory_int|)) is different from true [2022-11-02 20:30:04,191 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-02 20:30:04,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2022-11-02 20:30:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-02 20:30:04,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:07,530 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_#Ultimate.C_memset_#t~loopctr731_11| Int) (|v_#Ultimate.C_memset_#ptr.offset_6| Int)) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_array_list_clean_up_~list#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_aws_array_list_clean_up_~list#1.base|) (+ |v_#Ultimate.C_memset_#t~loopctr731_11| |v_#Ultimate.C_memset_#ptr.offset_6|) 0)) |c_ULTIMATE.start_aws_array_list_clean_up_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_array_list_clean_up_harness_~#list~0#1.offset|) 256) 0)) is different from false [2022-11-02 20:30:07,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:07,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627738289] [2022-11-02 20:30:07,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:30:07,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320980994] [2022-11-02 20:30:07,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320980994] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:07,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:30:07,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-11-02 20:30:07,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065118366] [2022-11-02 20:30:07,534 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:07,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:30:07,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:07,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:30:07,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=388, Unknown=2, NotChecked=82, Total=552 [2022-11-02 20:30:07,536 INFO L87 Difference]: Start difference. First operand 115 states and 137 transitions. Second operand has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 6 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-02 20:30:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:08,490 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2022-11-02 20:30:08,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:30:08,495 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 6 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 90 [2022-11-02 20:30:08,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:08,497 INFO L225 Difference]: With dead ends: 172 [2022-11-02 20:30:08,497 INFO L226 Difference]: Without dead ends: 165 [2022-11-02 20:30:08,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=142, Invalid=794, Unknown=2, NotChecked=118, Total=1056 [2022-11-02 20:30:08,498 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 91 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 616 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:08,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 781 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 388 Invalid, 0 Unknown, 616 Unchecked, 0.6s Time] [2022-11-02 20:30:08,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-02 20:30:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2022-11-02 20:30:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 112 states have (on average 1.1875) internal successors, (133), 115 states have internal predecessors, (133), 30 states have call successors, (30), 15 states have call predecessors, (30), 19 states have return successors, (43), 31 states have call predecessors, (43), 29 states have call successors, (43) [2022-11-02 20:30:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 206 transitions. [2022-11-02 20:30:08,515 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 206 transitions. Word has length 90 [2022-11-02 20:30:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:08,516 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 206 transitions. [2022-11-02 20:30:08,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 6 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-02 20:30:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 206 transitions. [2022-11-02 20:30:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-02 20:30:08,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:08,519 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:08,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:08,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:08,746 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:08,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:08,747 INFO L85 PathProgramCache]: Analyzing trace with hash 893232516, now seen corresponding path program 1 times [2022-11-02 20:30:08,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:08,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494886321] [2022-11-02 20:30:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:08,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:08,857 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:30:08,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308141196] [2022-11-02 20:30:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:08,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:08,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:08,859 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:08,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:30:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:09,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 2191 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-02 20:30:09,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:09,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:30:09,695 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:30:09,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-02 20:30:09,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:30:09,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:30:09,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2022-11-02 20:30:10,103 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_391 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_391) |c_#memory_$Pointer$.base|)) is different from true [2022-11-02 20:30:10,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:30:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:30:10,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:10,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:10,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494886321] [2022-11-02 20:30:10,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:30:10,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308141196] [2022-11-02 20:30:10,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308141196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:10,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:30:10,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-11-02 20:30:10,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770237236] [2022-11-02 20:30:10,719 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:10,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:30:10,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:30:10,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=351, Unknown=6, NotChecked=38, Total=462 [2022-11-02 20:30:10,721 INFO L87 Difference]: Start difference. First operand 162 states and 206 transitions. Second operand has 21 states, 20 states have (on average 3.15) internal successors, (63), 18 states have internal predecessors, (63), 8 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2022-11-02 20:30:11,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:11,554 INFO L93 Difference]: Finished difference Result 273 states and 341 transitions. [2022-11-02 20:30:11,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:30:11,555 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 18 states have internal predecessors, (63), 8 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) Word has length 96 [2022-11-02 20:30:11,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:11,557 INFO L225 Difference]: With dead ends: 273 [2022-11-02 20:30:11,557 INFO L226 Difference]: Without dead ends: 174 [2022-11-02 20:30:11,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=546, Unknown=14, NotChecked=48, Total=702 [2022-11-02 20:30:11,558 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 92 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 683 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:11,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 511 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 469 Invalid, 0 Unknown, 683 Unchecked, 0.6s Time] [2022-11-02 20:30:11,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-02 20:30:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2022-11-02 20:30:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 119 states have (on average 1.184873949579832) internal successors, (141), 123 states have internal predecessors, (141), 30 states have call successors, (30), 16 states have call predecessors, (30), 21 states have return successors, (46), 31 states have call predecessors, (46), 29 states have call successors, (46) [2022-11-02 20:30:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 217 transitions. [2022-11-02 20:30:11,575 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 217 transitions. Word has length 96 [2022-11-02 20:30:11,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:11,576 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 217 transitions. [2022-11-02 20:30:11,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.15) internal successors, (63), 18 states have internal predecessors, (63), 8 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2022-11-02 20:30:11,576 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 217 transitions. [2022-11-02 20:30:11,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-02 20:30:11,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:11,578 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:11,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:11,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:30:11,798 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:11,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:11,799 INFO L85 PathProgramCache]: Analyzing trace with hash 412152258, now seen corresponding path program 1 times [2022-11-02 20:30:11,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:11,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633188067] [2022-11-02 20:30:11,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:11,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:11,905 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:30:11,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35240736] [2022-11-02 20:30:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:11,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:11,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:11,907 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:11,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:30:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:12,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 2186 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:30:12,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:30:12,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:30:12,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:12,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633188067] [2022-11-02 20:30:12,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:30:12,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35240736] [2022-11-02 20:30:12,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35240736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:12,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:12,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:30:12,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403046099] [2022-11-02 20:30:12,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:12,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:30:12,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:12,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:30:12,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:30:12,401 INFO L87 Difference]: Start difference. First operand 171 states and 217 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-02 20:30:12,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:12,442 INFO L93 Difference]: Finished difference Result 310 states and 402 transitions. [2022-11-02 20:30:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:30:12,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 96 [2022-11-02 20:30:12,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:12,445 INFO L225 Difference]: With dead ends: 310 [2022-11-02 20:30:12,445 INFO L226 Difference]: Without dead ends: 179 [2022-11-02 20:30:12,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:30:12,446 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 7 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:12,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 382 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:30:12,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-02 20:30:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 173. [2022-11-02 20:30:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 121 states have (on average 1.1735537190082646) internal successors, (142), 125 states have internal predecessors, (142), 30 states have call successors, (30), 16 states have call predecessors, (30), 21 states have return successors, (46), 31 states have call predecessors, (46), 29 states have call successors, (46) [2022-11-02 20:30:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 218 transitions. [2022-11-02 20:30:12,461 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 218 transitions. Word has length 96 [2022-11-02 20:30:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:12,462 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 218 transitions. [2022-11-02 20:30:12,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-02 20:30:12,462 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 218 transitions. [2022-11-02 20:30:12,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-02 20:30:12,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:12,464 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:12,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:12,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:12,678 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:12,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:12,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1999511127, now seen corresponding path program 2 times [2022-11-02 20:30:12,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:12,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364301642] [2022-11-02 20:30:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:12,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:12,755 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:30:12,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158753879] [2022-11-02 20:30:12,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:30:12,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:12,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:12,757 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:12,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:30:13,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:30:13,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:30:13,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 2171 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:30:13,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:30:13,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:30:13,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:13,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364301642] [2022-11-02 20:30:13,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:30:13,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158753879] [2022-11-02 20:30:13,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158753879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:13,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:30:13,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-02 20:30:13,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792700992] [2022-11-02 20:30:13,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:13,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:30:13,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:30:13,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:30:13,684 INFO L87 Difference]: Start difference. First operand 173 states and 218 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-02 20:30:13,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:13,833 INFO L93 Difference]: Finished difference Result 262 states and 334 transitions. [2022-11-02 20:30:13,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:30:13,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 91 [2022-11-02 20:30:13,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:13,835 INFO L225 Difference]: With dead ends: 262 [2022-11-02 20:30:13,835 INFO L226 Difference]: Without dead ends: 185 [2022-11-02 20:30:13,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:30:13,836 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 28 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:13,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 867 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:30:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-02 20:30:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2022-11-02 20:30:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 129 states have (on average 1.178294573643411) internal successors, (152), 133 states have internal predecessors, (152), 30 states have call successors, (30), 16 states have call predecessors, (30), 21 states have return successors, (46), 31 states have call predecessors, (46), 29 states have call successors, (46) [2022-11-02 20:30:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 228 transitions. [2022-11-02 20:30:13,898 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 228 transitions. Word has length 91 [2022-11-02 20:30:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:13,900 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 228 transitions. [2022-11-02 20:30:13,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-02 20:30:13,900 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 228 transitions. [2022-11-02 20:30:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-02 20:30:13,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:13,903 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:13,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:14,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:30:14,104 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:14,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:14,105 INFO L85 PathProgramCache]: Analyzing trace with hash 134736496, now seen corresponding path program 1 times [2022-11-02 20:30:14,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:14,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689923630] [2022-11-02 20:30:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:14,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:14,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:30:14,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296199589] [2022-11-02 20:30:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:14,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:14,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:14,177 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:14,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:30:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:14,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 2182 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:30:14,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-02 20:30:14,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:30:14,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:14,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689923630] [2022-11-02 20:30:14,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:30:14,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296199589] [2022-11-02 20:30:14,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296199589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:14,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:14,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:30:14,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653555029] [2022-11-02 20:30:14,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:14,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:30:14,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:14,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:30:14,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:30:14,793 INFO L87 Difference]: Start difference. First operand 181 states and 228 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:30:15,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:15,034 INFO L93 Difference]: Finished difference Result 258 states and 321 transitions. [2022-11-02 20:30:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:30:15,035 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 93 [2022-11-02 20:30:15,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:15,036 INFO L225 Difference]: With dead ends: 258 [2022-11-02 20:30:15,036 INFO L226 Difference]: Without dead ends: 179 [2022-11-02 20:30:15,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:30:15,038 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 157 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:15,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 431 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:30:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-02 20:30:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-11-02 20:30:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 128 states have (on average 1.171875) internal successors, (150), 131 states have internal predecessors, (150), 30 states have call successors, (30), 16 states have call predecessors, (30), 20 states have return successors, (44), 31 states have call predecessors, (44), 29 states have call successors, (44) [2022-11-02 20:30:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 224 transitions. [2022-11-02 20:30:15,061 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 224 transitions. Word has length 93 [2022-11-02 20:30:15,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:15,061 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 224 transitions. [2022-11-02 20:30:15,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-02 20:30:15,062 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 224 transitions. [2022-11-02 20:30:15,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-02 20:30:15,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:15,064 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:15,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:15,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:30:15,290 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:15,291 INFO L85 PathProgramCache]: Analyzing trace with hash 966825052, now seen corresponding path program 1 times [2022-11-02 20:30:15,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:15,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712695742] [2022-11-02 20:30:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:15,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:15,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:30:15,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854425826] [2022-11-02 20:30:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:15,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:15,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:15,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:15,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:30:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:15,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 2323 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-02 20:30:15,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:16,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:30:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-02 20:30:16,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:16,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-02 20:30:17,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-02 20:30:17,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-02 20:30:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-02 20:30:17,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:17,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712695742] [2022-11-02 20:30:17,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:30:17,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854425826] [2022-11-02 20:30:17,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854425826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:17,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:30:17,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2022-11-02 20:30:17,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644224284] [2022-11-02 20:30:17,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:17,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-02 20:30:17,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:17,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-02 20:30:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:30:17,342 INFO L87 Difference]: Start difference. First operand 179 states and 224 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 21 states have internal predecessors, (83), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-02 20:30:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:18,059 INFO L93 Difference]: Finished difference Result 193 states and 239 transitions. [2022-11-02 20:30:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:30:18,060 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 21 states have internal predecessors, (83), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) Word has length 108 [2022-11-02 20:30:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:18,061 INFO L225 Difference]: With dead ends: 193 [2022-11-02 20:30:18,062 INFO L226 Difference]: Without dead ends: 186 [2022-11-02 20:30:18,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:30:18,063 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 43 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:18,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1551 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 332 Invalid, 0 Unknown, 63 Unchecked, 0.5s Time] [2022-11-02 20:30:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-02 20:30:18,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 166. [2022-11-02 20:30:18,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 121 states have internal predecessors, (138), 27 states have call successors, (27), 16 states have call predecessors, (27), 19 states have return successors, (38), 28 states have call predecessors, (38), 26 states have call successors, (38) [2022-11-02 20:30:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 203 transitions. [2022-11-02 20:30:18,084 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 203 transitions. Word has length 108 [2022-11-02 20:30:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:18,084 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 203 transitions. [2022-11-02 20:30:18,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 21 states have internal predecessors, (83), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-02 20:30:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 203 transitions. [2022-11-02 20:30:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-02 20:30:18,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:18,087 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:18,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:18,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:18,314 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:18,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:18,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1799659061, now seen corresponding path program 1 times [2022-11-02 20:30:18,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:18,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872862708] [2022-11-02 20:30:18,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:18,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:18,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:30:18,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545662735] [2022-11-02 20:30:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:18,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:18,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:18,400 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:18,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:30:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:18,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 2330 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:30:18,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-02 20:30:19,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-02 20:30:19,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:19,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872862708] [2022-11-02 20:30:19,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:30:19,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545662735] [2022-11-02 20:30:19,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545662735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:19,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:30:19,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-02 20:30:19,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446128979] [2022-11-02 20:30:19,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:19,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:30:19,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:30:19,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:30:19,273 INFO L87 Difference]: Start difference. First operand 166 states and 203 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-02 20:30:19,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:19,380 INFO L93 Difference]: Finished difference Result 201 states and 243 transitions. [2022-11-02 20:30:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:30:19,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2022-11-02 20:30:19,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:19,385 INFO L225 Difference]: With dead ends: 201 [2022-11-02 20:30:19,385 INFO L226 Difference]: Without dead ends: 169 [2022-11-02 20:30:19,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:30:19,389 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 11 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:19,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 382 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:30:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-02 20:30:19,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-11-02 20:30:19,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 122 states have (on average 1.1557377049180328) internal successors, (141), 124 states have internal predecessors, (141), 27 states have call successors, (27), 16 states have call predecessors, (27), 19 states have return successors, (38), 28 states have call predecessors, (38), 26 states have call successors, (38) [2022-11-02 20:30:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 206 transitions. [2022-11-02 20:30:19,424 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 206 transitions. Word has length 111 [2022-11-02 20:30:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:19,424 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 206 transitions. [2022-11-02 20:30:19,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-02 20:30:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 206 transitions. [2022-11-02 20:30:19,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-02 20:30:19,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:19,427 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:19,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:19,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:19,642 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:19,643 INFO L85 PathProgramCache]: Analyzing trace with hash -564772413, now seen corresponding path program 2 times [2022-11-02 20:30:19,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:19,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531985376] [2022-11-02 20:30:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:19,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:19,726 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:30:19,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207118507] [2022-11-02 20:30:19,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:30:19,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:19,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:19,728 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:19,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:30:20,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:30:20,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:30:20,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 2387 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-02 20:30:20,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:20,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:30:20,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:30:20,959 INFO L356 Elim1Store]: treesize reduction 34, result has 33.3 percent of original size [2022-11-02 20:30:20,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 33 [2022-11-02 20:30:21,001 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:30:21,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2022-11-02 20:30:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-02 20:30:21,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:22,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 89 [2022-11-02 20:30:23,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-02 20:30:23,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 278 [2022-11-02 20:30:23,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-02 20:30:23,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 242 treesize of output 238 [2022-11-02 20:30:23,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-02 20:30:23,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 230 [2022-11-02 20:30:23,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-02 20:30:23,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 282 [2022-11-02 20:30:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-02 20:30:24,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:24,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531985376] [2022-11-02 20:30:24,069 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:30:24,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207118507] [2022-11-02 20:30:24,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207118507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:30:24,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:30:24,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2022-11-02 20:30:24,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746853642] [2022-11-02 20:30:24,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:24,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-02 20:30:24,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-02 20:30:24,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:30:24,073 INFO L87 Difference]: Start difference. First operand 169 states and 206 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 28 states have internal predecessors, (93), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-02 20:30:26,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:26,063 INFO L93 Difference]: Finished difference Result 184 states and 224 transitions. [2022-11-02 20:30:26,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:30:26,064 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 28 states have internal predecessors, (93), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) Word has length 114 [2022-11-02 20:30:26,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:26,066 INFO L225 Difference]: With dead ends: 184 [2022-11-02 20:30:26,066 INFO L226 Difference]: Without dead ends: 177 [2022-11-02 20:30:26,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2022-11-02 20:30:26,068 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 74 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 2030 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:26,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 2030 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 751 Invalid, 0 Unknown, 129 Unchecked, 1.4s Time] [2022-11-02 20:30:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-02 20:30:26,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-11-02 20:30:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 126 states have (on average 1.1507936507936507) internal successors, (145), 129 states have internal predecessors, (145), 27 states have call successors, (27), 16 states have call predecessors, (27), 20 states have return successors, (40), 28 states have call predecessors, (40), 26 states have call successors, (40) [2022-11-02 20:30:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 212 transitions. [2022-11-02 20:30:26,088 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 212 transitions. Word has length 114 [2022-11-02 20:30:26,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:26,089 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 212 transitions. [2022-11-02 20:30:26,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 28 states have internal predecessors, (93), 7 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 9 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-02 20:30:26,089 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 212 transitions. [2022-11-02 20:30:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-02 20:30:26,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:26,091 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:26,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-02 20:30:26,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:26,306 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:26,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:26,307 INFO L85 PathProgramCache]: Analyzing trace with hash -582835346, now seen corresponding path program 3 times [2022-11-02 20:30:26,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:26,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524124766] [2022-11-02 20:30:26,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:26,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:26,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:30:26,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581970742] [2022-11-02 20:30:26,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:30:26,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:26,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:26,387 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:26,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:30:28,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:30:28,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:30:28,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 2365 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-02 20:30:28,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:29,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:30:29,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-02 20:30:29,207 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:30:29,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-11-02 20:30:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-02 20:30:29,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:29,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:29,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524124766] [2022-11-02 20:30:29,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:30:29,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581970742] [2022-11-02 20:30:29,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581970742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:30:29,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:30:29,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-02 20:30:29,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440048475] [2022-11-02 20:30:29,580 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 20:30:29,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:30:29,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:29,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:30:29,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:30:29,581 INFO L87 Difference]: Start difference. First operand 174 states and 212 transitions. Second operand has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-02 20:30:30,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:30,145 INFO L93 Difference]: Finished difference Result 208 states and 250 transitions. [2022-11-02 20:30:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:30:30,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 117 [2022-11-02 20:30:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:30,148 INFO L225 Difference]: With dead ends: 208 [2022-11-02 20:30:30,148 INFO L226 Difference]: Without dead ends: 178 [2022-11-02 20:30:30,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:30:30,149 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 35 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:30,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1133 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:30:30,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-02 20:30:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2022-11-02 20:30:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 127 states have (on average 1.1496062992125984) internal successors, (146), 130 states have internal predecessors, (146), 27 states have call successors, (27), 16 states have call predecessors, (27), 20 states have return successors, (40), 28 states have call predecessors, (40), 26 states have call successors, (40) [2022-11-02 20:30:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 213 transitions. [2022-11-02 20:30:30,170 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 213 transitions. Word has length 117 [2022-11-02 20:30:30,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:30,170 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 213 transitions. [2022-11-02 20:30:30,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 5 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-02 20:30:30,171 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 213 transitions. [2022-11-02 20:30:30,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-02 20:30:30,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:30,173 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:30,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:30,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:30:30,398 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:30,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:30,399 INFO L85 PathProgramCache]: Analyzing trace with hash 36072420, now seen corresponding path program 1 times [2022-11-02 20:30:30,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:30,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981519174] [2022-11-02 20:30:30,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:30,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:30,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:30:30,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228980661] [2022-11-02 20:30:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:30,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:30,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:30,479 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:30,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:30:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:30:31,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 2417 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:30:31,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-02 20:30:31,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:30:31,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:30:31,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981519174] [2022-11-02 20:30:31,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:30:31,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228980661] [2022-11-02 20:30:31,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228980661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:30:31,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:30:31,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-02 20:30:31,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941366706] [2022-11-02 20:30:31,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:30:31,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:30:31,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:30:31,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:30:31,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:30:31,251 INFO L87 Difference]: Start difference. First operand 175 states and 213 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-02 20:30:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:30:31,600 INFO L93 Difference]: Finished difference Result 235 states and 282 transitions. [2022-11-02 20:30:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:30:31,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) Word has length 124 [2022-11-02 20:30:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:30:31,602 INFO L225 Difference]: With dead ends: 235 [2022-11-02 20:30:31,602 INFO L226 Difference]: Without dead ends: 176 [2022-11-02 20:30:31,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-11-02 20:30:31,603 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 15 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1757 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:30:31,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1757 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:30:31,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-02 20:30:31,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 169. [2022-11-02 20:30:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 123 states have (on average 1.1544715447154472) internal successors, (142), 126 states have internal predecessors, (142), 26 states have call successors, (26), 16 states have call predecessors, (26), 19 states have return successors, (34), 26 states have call predecessors, (34), 25 states have call successors, (34) [2022-11-02 20:30:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2022-11-02 20:30:31,625 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 124 [2022-11-02 20:30:31,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:30:31,626 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2022-11-02 20:30:31,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (15), 2 states have call predecessors, (15), 7 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-02 20:30:31,626 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2022-11-02 20:30:31,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-02 20:30:31,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:30:31,629 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:30:31,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:30:31,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:30:31,842 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:30:31,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:30:31,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1973683772, now seen corresponding path program 4 times [2022-11-02 20:30:31,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:30:31,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140481882] [2022-11-02 20:30:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:30:31,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:30:31,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:30:31,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724625273] [2022-11-02 20:30:31,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:30:31,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:30:31,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:30:31,923 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:30:31,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa1193ee-3064-4be7-8c62-db429ca2f956/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:30:32,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:30:32,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:30:32,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 2413 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-02 20:30:32,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:30:32,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-02 20:30:32,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-02 20:30:32,829 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:30:32,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-02 20:30:32,914 INFO L356 Elim1Store]: treesize reduction 52, result has 33.3 percent of original size [2022-11-02 20:30:32,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2022-11-02 20:30:32,999 INFO L356 Elim1Store]: treesize reduction 52, result has 33.3 percent of original size [2022-11-02 20:30:33,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2022-11-02 20:30:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-02 20:30:33,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:30:34,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1736 treesize of output 1724 [2022-11-02 20:30:50,155 WARN L234 SmtUtils]: Spent 14.04s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:31:10,624 WARN L234 SmtUtils]: Spent 14.10s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:31:35,118 WARN L234 SmtUtils]: Spent 14.10s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:31:35,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-11-02 20:31:35,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1942 treesize of output 1926 [2022-11-02 20:31:36,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-11-02 20:31:36,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 958 treesize of output 950 [2022-11-02 20:31:37,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-02 20:31:37,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17590 treesize of output 17526