./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_buf_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_buf_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN --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 13ec24500153ff48401c44b6cbf6e64bbffda498093f21927cfcfb52ad2376ab --- 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-6b4ec56 [2022-11-20 11:17:18,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:17:18,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:17:18,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:17:18,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:17:18,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:17:18,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:17:18,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:17:18,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:17:18,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:17:18,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:17:18,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:17:18,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:17:18,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:17:18,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:17:18,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:17:18,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:17:18,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:17:18,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:17:18,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:17:18,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:17:18,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:17:18,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:17:18,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:17:18,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:17:18,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:17:18,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:17:18,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:17:18,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:17:18,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:17:18,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:17:18,549 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:17:18,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:17:18,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:17:18,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:17:18,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:17:18,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:17:18,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:17:18,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:17:18,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:17:18,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:17:18,557 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-20 11:17:18,580 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:17:18,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:17:18,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:17:18,581 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:17:18,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:17:18,582 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:17:18,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:17:18,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:17:18,584 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:17:18,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:17:18,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:17:18,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:17:18,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:17:18,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:17:18,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:17:18,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:17:18,586 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:17:18,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:17:18,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:17:18,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:17:18,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:17:18,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:17:18,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:17:18,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:17:18,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:17:18,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:17:18,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:17:18,590 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:17:18,591 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:17:18,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:17:18,592 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_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13ec24500153ff48401c44b6cbf6e64bbffda498093f21927cfcfb52ad2376ab [2022-11-20 11:17:18,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:17:18,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:17:18,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:17:18,913 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:17:18,913 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:17:18,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_buf_harness.i [2022-11-20 11:17:22,375 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:17:23,092 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:17:23,093 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_buf_harness.i [2022-11-20 11:17:23,133 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/data/eb9babcac/8866e82601cd4071b14f1a23dbad8f4a/FLAG63ec58783 [2022-11-20 11:17:23,152 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/data/eb9babcac/8866e82601cd4071b14f1a23dbad8f4a [2022-11-20 11:17:23,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:17:23,157 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:17:23,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:17:23,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:17:23,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:17:23,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:17:23" (1/1) ... [2022-11-20 11:17:23,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69be049d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:17:23, skipping insertion in model container [2022-11-20 11:17:23,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:17:23" (1/1) ... [2022-11-20 11:17:23,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:17:23,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:17:23,599 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_buf_harness.i[4498,4511] [2022-11-20 11:17:23,608 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_buf_harness.i[4558,4571] [2022-11-20 11:17:24,751 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:24,757 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:24,758 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:24,760 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:24,766 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:24,794 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:24,801 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:24,804 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:24,810 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:25,420 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 11:17:25,422 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 11:17:25,424 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 11:17:25,426 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 11:17:25,428 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 11:17:25,429 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 11:17:25,430 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 11:17:25,431 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 11:17:25,432 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 11:17:25,433 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 11:17:25,771 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 11:17:25,949 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:25,949 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:26,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:17:26,120 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:17:26,150 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_buf_harness.i[4498,4511] [2022-11-20 11:17:26,178 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_buf_harness.i[4558,4571] [2022-11-20 11:17:26,266 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:26,266 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:26,267 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:26,269 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:26,270 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:26,278 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:26,278 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:26,284 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:26,284 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:26,345 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 11:17:26,346 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 11:17:26,347 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 11:17:26,348 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 11:17:26,349 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 11:17:26,349 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 11:17:26,350 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 11:17:26,351 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 11:17:26,351 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 11:17:26,352 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 11:17:26,375 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 11:17:26,462 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:26,463 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 11:17:26,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:17:26,840 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:17:26,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:17:26 WrapperNode [2022-11-20 11:17:26,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:17:26,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:17:26,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:17:26,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:17:26,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:17:26" (1/1) ... [2022-11-20 11:17:26,988 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:17:26" (1/1) ... [2022-11-20 11:17:27,096 INFO L138 Inliner]: procedures = 690, calls = 2638, calls flagged for inlining = 61, calls inlined = 9, statements flattened = 867 [2022-11-20 11:17:27,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:17:27,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:17:27,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:17:27,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:17:27,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:17:26" (1/1) ... [2022-11-20 11:17:27,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:17:26" (1/1) ... [2022-11-20 11:17:27,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:17:26" (1/1) ... [2022-11-20 11:17:27,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:17:26" (1/1) ... [2022-11-20 11:17:27,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:17:26" (1/1) ... [2022-11-20 11:17:27,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:17:26" (1/1) ... [2022-11-20 11:17:27,161 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:17:26" (1/1) ... [2022-11-20 11:17:27,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:17:26" (1/1) ... [2022-11-20 11:17:27,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:17:27,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:17:27,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:17:27,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:17:27,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:17:26" (1/1) ... [2022-11-20 11:17:27,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:17:27,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:27,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:17:27,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:17:27,289 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-20 11:17:27,289 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-20 11:17:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-11-20 11:17:27,290 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-11-20 11:17:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:17:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-20 11:17:27,290 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-20 11:17:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:17:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 11:17:27,291 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 11:17:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_from_buf [2022-11-20 11:17:27,292 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_from_buf [2022-11-20 11:17:27,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:17:27,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:17:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 11:17:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:17:27,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:17:27,293 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-20 11:17:27,293 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-20 11:17:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-11-20 11:17:27,294 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-11-20 11:17:27,294 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 11:17:27,295 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 11:17:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:17:27,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 11:17:27,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 11:17:27,296 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-20 11:17:27,296 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-20 11:17:27,296 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-20 11:17:27,297 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-20 11:17:27,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:17:27,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:17:27,670 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:17:27,673 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:17:29,268 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:17:29,278 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:17:29,279 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 11:17:29,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:17:29 BoogieIcfgContainer [2022-11-20 11:17:29,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:17:29,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:17:29,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:17:29,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:17:29,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:17:23" (1/3) ... [2022-11-20 11:17:29,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6549265b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:17:29, skipping insertion in model container [2022-11-20 11:17:29,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:17:26" (2/3) ... [2022-11-20 11:17:29,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6549265b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:17:29, skipping insertion in model container [2022-11-20 11:17:29,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:17:29" (3/3) ... [2022-11-20 11:17:29,293 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_from_buf_harness.i [2022-11-20 11:17:29,316 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:17:29,316 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:17:29,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:17:29,382 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;@1e33174, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:17:29,383 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 11:17:29,388 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 88 states have (on average 1.25) internal successors, (110), 89 states have internal predecessors, (110), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-20 11:17:29,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 11:17:29,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:29,401 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] [2022-11-20 11:17:29,401 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:29,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:29,407 INFO L85 PathProgramCache]: Analyzing trace with hash -963084782, now seen corresponding path program 1 times [2022-11-20 11:17:29,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:29,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971077823] [2022-11-20 11:17:29,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:29,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:30,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:17:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:30,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:17:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:30,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:17:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:30,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:17:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:30,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:17:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:30,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:17:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:30,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:17:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:30,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 11:17:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:30,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-20 11:17:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:17:30,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:30,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971077823] [2022-11-20 11:17:30,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971077823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:17:30,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:17:30,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:17:30,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590455337] [2022-11-20 11:17:30,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:17:30,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:17:30,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:30,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:17:30,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:17:30,303 INFO L87 Difference]: Start difference. First operand has 128 states, 88 states have (on average 1.25) internal successors, (110), 89 states have internal predecessors, (110), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-20 11:17:30,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:30,700 INFO L93 Difference]: Finished difference Result 252 states and 347 transitions. [2022-11-20 11:17:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:17:30,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2022-11-20 11:17:30,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:30,712 INFO L225 Difference]: With dead ends: 252 [2022-11-20 11:17:30,712 INFO L226 Difference]: Without dead ends: 121 [2022-11-20 11:17:30,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:17:30,720 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 62 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:30,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 139 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:17:30,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-20 11:17:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-20 11:17:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 83 states have internal predecessors, (100), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-20 11:17:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 155 transitions. [2022-11-20 11:17:30,781 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 155 transitions. Word has length 65 [2022-11-20 11:17:30,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:30,781 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 155 transitions. [2022-11-20 11:17:30,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-20 11:17:30,782 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 155 transitions. [2022-11-20 11:17:30,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 11:17:30,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:30,784 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] [2022-11-20 11:17:30,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:17:30,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:30,785 INFO L85 PathProgramCache]: Analyzing trace with hash 178526858, now seen corresponding path program 1 times [2022-11-20 11:17:30,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:30,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636502052] [2022-11-20 11:17:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:30,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:31,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:17:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:31,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:17:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:31,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:17:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:31,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:17:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:31,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:17:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:31,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:17:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:31,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:17:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:31,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 11:17:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:31,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-20 11:17:31,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 11:17:31,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:31,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636502052] [2022-11-20 11:17:31,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636502052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:31,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520641691] [2022-11-20 11:17:31,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:31,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:31,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:31,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:31,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:17:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:32,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 2567 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:17:32,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:17:32,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:17:32,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520641691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:17:32,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:17:32,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-20 11:17:32,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041595291] [2022-11-20 11:17:32,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:17:32,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:17:32,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:32,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:17:32,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:17:32,726 INFO L87 Difference]: Start difference. First operand 121 states and 155 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-20 11:17:32,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:32,971 INFO L93 Difference]: Finished difference Result 220 states and 286 transitions. [2022-11-20 11:17:32,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:17:32,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 65 [2022-11-20 11:17:32,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:32,976 INFO L225 Difference]: With dead ends: 220 [2022-11-20 11:17:32,976 INFO L226 Difference]: Without dead ends: 124 [2022-11-20 11:17:32,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:17:32,979 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 181 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:32,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 330 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:17:32,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-20 11:17:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-11-20 11:17:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 86 states have internal predecessors, (102), 28 states have call successors, (28), 10 states have call predecessors, (28), 11 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-11-20 11:17:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-11-20 11:17:33,002 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 65 [2022-11-20 11:17:33,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:33,002 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-11-20 11:17:33,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-20 11:17:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-11-20 11:17:33,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:17:33,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:33,006 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] [2022-11-20 11:17:33,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:17:33,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-20 11:17:33,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:33,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash 253294421, now seen corresponding path program 1 times [2022-11-20 11:17:33,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:33,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858480538] [2022-11-20 11:17:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:33,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:34,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:17:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:34,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:17:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:34,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:17:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:34,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:17:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:34,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:17:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:34,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:17:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:34,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 11:17:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:34,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-20 11:17:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:34,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-20 11:17:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 11:17:34,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:34,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858480538] [2022-11-20 11:17:34,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858480538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:34,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959069864] [2022-11-20 11:17:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:34,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:34,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:34,976 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:35,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:17:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:35,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 2584 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:17:35,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:17:35,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:17:35,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959069864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:17:35,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:17:35,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2022-11-20 11:17:35,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891454772] [2022-11-20 11:17:35,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:17:35,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:17:35,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:35,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:17:35,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:17:35,816 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-20 11:17:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:36,169 INFO L93 Difference]: Finished difference Result 213 states and 272 transitions. [2022-11-20 11:17:36,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:17:36,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 71 [2022-11-20 11:17:36,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:36,172 INFO L225 Difference]: With dead ends: 213 [2022-11-20 11:17:36,172 INFO L226 Difference]: Without dead ends: 121 [2022-11-20 11:17:36,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:17:36,176 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 180 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:36,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 637 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:17:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-20 11:17:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-20 11:17:36,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 83 states have internal predecessors, (99), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-20 11:17:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 154 transitions. [2022-11-20 11:17:36,191 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 154 transitions. Word has length 71 [2022-11-20 11:17:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:36,192 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 154 transitions. [2022-11-20 11:17:36,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-20 11:17:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 154 transitions. [2022-11-20 11:17:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-20 11:17:36,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:36,195 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:36,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:17:36,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:36,406 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:36,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:36,406 INFO L85 PathProgramCache]: Analyzing trace with hash -241480736, now seen corresponding path program 1 times [2022-11-20 11:17:36,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:36,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671862698] [2022-11-20 11:17:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:36,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:37,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:17:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:37,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:17:37,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:37,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:17:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:37,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:17:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:37,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:17:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:37,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:17:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:37,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 11:17:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:37,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-20 11:17:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:37,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 11:17:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 11:17:37,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:37,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671862698] [2022-11-20 11:17:37,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671862698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:17:37,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:17:37,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:17:37,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815370484] [2022-11-20 11:17:37,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:17:37,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:17:37,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:37,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:17:37,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:17:37,218 INFO L87 Difference]: Start difference. First operand 121 states and 154 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-20 11:17:37,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:37,702 INFO L93 Difference]: Finished difference Result 207 states and 264 transitions. [2022-11-20 11:17:37,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:17:37,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 77 [2022-11-20 11:17:37,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:37,704 INFO L225 Difference]: With dead ends: 207 [2022-11-20 11:17:37,704 INFO L226 Difference]: Without dead ends: 124 [2022-11-20 11:17:37,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:17:37,706 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 78 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:37,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 252 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:17:37,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-20 11:17:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-11-20 11:17:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 86 states have internal predecessors, (101), 28 states have call successors, (28), 10 states have call predecessors, (28), 11 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-11-20 11:17:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 157 transitions. [2022-11-20 11:17:37,730 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 157 transitions. Word has length 77 [2022-11-20 11:17:37,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:37,733 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 157 transitions. [2022-11-20 11:17:37,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-20 11:17:37,734 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 157 transitions. [2022-11-20 11:17:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-20 11:17:37,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:37,747 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:37,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:17:37,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:37,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1300692571, now seen corresponding path program 1 times [2022-11-20 11:17:37,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:37,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391911941] [2022-11-20 11:17:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:37,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:38,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:17:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:38,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:17:38,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:38,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:17:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:38,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:17:38,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:38,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:17:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:38,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:17:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:38,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 11:17:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:39,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-20 11:17:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:39,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 11:17:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 11:17:39,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:39,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391911941] [2022-11-20 11:17:39,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391911941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:17:39,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:17:39,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:17:39,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431711088] [2022-11-20 11:17:39,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:17:39,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:17:39,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:39,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:17:39,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:17:39,123 INFO L87 Difference]: Start difference. First operand 124 states and 157 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-20 11:17:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:39,895 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2022-11-20 11:17:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:17:39,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 79 [2022-11-20 11:17:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:39,897 INFO L225 Difference]: With dead ends: 136 [2022-11-20 11:17:39,898 INFO L226 Difference]: Without dead ends: 134 [2022-11-20 11:17:39,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:17:39,899 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 82 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:39,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 516 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:17:39,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-20 11:17:39,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-11-20 11:17:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 93 states have internal predecessors, (107), 29 states have call successors, (29), 11 states have call predecessors, (29), 13 states have return successors, (31), 28 states have call predecessors, (31), 28 states have call successors, (31) [2022-11-20 11:17:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2022-11-20 11:17:39,914 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 79 [2022-11-20 11:17:39,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:39,915 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2022-11-20 11:17:39,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-20 11:17:39,915 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2022-11-20 11:17:39,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-20 11:17:39,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:39,917 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-20 11:17:39,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:17:39,917 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:39,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:39,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1177544493, now seen corresponding path program 1 times [2022-11-20 11:17:39,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:39,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932157659] [2022-11-20 11:17:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:39,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:40,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:44,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:17:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:44,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:17:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:44,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:17:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:44,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:17:44,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:44,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:17:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:44,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:17:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:45,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 11:17:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:45,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-20 11:17:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:45,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-20 11:17:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 11:17:45,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:45,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932157659] [2022-11-20 11:17:45,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932157659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:17:45,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:17:45,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-20 11:17:45,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271480877] [2022-11-20 11:17:45,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:17:45,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:17:45,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:45,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:17:45,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:17:45,523 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 18 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-20 11:17:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:48,182 INFO L93 Difference]: Finished difference Result 264 states and 343 transitions. [2022-11-20 11:17:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:17:48,183 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 83 [2022-11-20 11:17:48,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:48,185 INFO L225 Difference]: With dead ends: 264 [2022-11-20 11:17:48,185 INFO L226 Difference]: Without dead ends: 174 [2022-11-20 11:17:48,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:17:48,187 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 163 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:48,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 473 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1615 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 11:17:48,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-20 11:17:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 144. [2022-11-20 11:17:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 99 states have internal predecessors, (112), 34 states have call successors, (34), 12 states have call predecessors, (34), 14 states have return successors, (36), 32 states have call predecessors, (36), 33 states have call successors, (36) [2022-11-20 11:17:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 182 transitions. [2022-11-20 11:17:48,223 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 182 transitions. Word has length 83 [2022-11-20 11:17:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:48,224 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 182 transitions. [2022-11-20 11:17:48,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-20 11:17:48,224 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 182 transitions. [2022-11-20 11:17:48,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-20 11:17:48,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:48,233 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-11-20 11:17:48,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:17:48,234 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:48,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:48,234 INFO L85 PathProgramCache]: Analyzing trace with hash 340573773, now seen corresponding path program 1 times [2022-11-20 11:17:48,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:48,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899564482] [2022-11-20 11:17:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:48,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:51,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:17:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:51,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:17:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:51,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:17:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:51,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:17:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:51,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:17:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:51,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:17:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:51,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:17:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:51,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-20 11:17:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:51,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-20 11:17:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:51,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-20 11:17:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 11:17:52,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:52,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899564482] [2022-11-20 11:17:52,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899564482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:17:52,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:17:52,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 11:17:52,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338756363] [2022-11-20 11:17:52,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:17:52,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:17:52,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:52,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:17:52,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:17:52,043 INFO L87 Difference]: Start difference. First operand 144 states and 182 transitions. Second operand has 16 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 11:17:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:53,737 INFO L93 Difference]: Finished difference Result 260 states and 335 transitions. [2022-11-20 11:17:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:17:53,738 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 90 [2022-11-20 11:17:53,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:53,739 INFO L225 Difference]: With dead ends: 260 [2022-11-20 11:17:53,740 INFO L226 Difference]: Without dead ends: 170 [2022-11-20 11:17:53,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:17:53,741 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 250 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:53,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 576 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:17:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-20 11:17:53,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2022-11-20 11:17:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 107 states have (on average 1.1962616822429906) internal successors, (128), 112 states have internal predecessors, (128), 36 states have call successors, (36), 12 states have call predecessors, (36), 15 states have return successors, (42), 34 states have call predecessors, (42), 35 states have call successors, (42) [2022-11-20 11:17:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 206 transitions. [2022-11-20 11:17:53,765 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 206 transitions. Word has length 90 [2022-11-20 11:17:53,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:53,766 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 206 transitions. [2022-11-20 11:17:53,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 6 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 11:17:53,767 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 206 transitions. [2022-11-20 11:17:53,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-20 11:17:53,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:53,769 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-11-20 11:17:53,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:17:53,769 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:53,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1726777167, now seen corresponding path program 1 times [2022-11-20 11:17:53,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:53,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036485021] [2022-11-20 11:17:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:53,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:54,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:17:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:54,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:17:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:54,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:17:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:54,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:17:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:54,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:17:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:54,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:17:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:54,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:17:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:54,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-20 11:17:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:54,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-20 11:17:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:54,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-20 11:17:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 11:17:54,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:54,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036485021] [2022-11-20 11:17:54,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036485021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:17:54,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:17:54,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:17:54,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143012535] [2022-11-20 11:17:54,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:17:54,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:17:54,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:54,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:17:54,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:17:54,203 INFO L87 Difference]: Start difference. First operand 159 states and 206 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:17:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:54,667 INFO L93 Difference]: Finished difference Result 293 states and 388 transitions. [2022-11-20 11:17:54,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:17:54,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 90 [2022-11-20 11:17:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:54,670 INFO L225 Difference]: With dead ends: 293 [2022-11-20 11:17:54,670 INFO L226 Difference]: Without dead ends: 159 [2022-11-20 11:17:54,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:17:54,671 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 81 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:54,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 259 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:17:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-20 11:17:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-11-20 11:17:54,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 112 states have internal predecessors, (127), 36 states have call successors, (36), 12 states have call predecessors, (36), 15 states have return successors, (42), 34 states have call predecessors, (42), 35 states have call successors, (42) [2022-11-20 11:17:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 205 transitions. [2022-11-20 11:17:54,705 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 205 transitions. Word has length 90 [2022-11-20 11:17:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:54,706 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 205 transitions. [2022-11-20 11:17:54,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:17:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 205 transitions. [2022-11-20 11:17:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-20 11:17:54,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:54,708 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:54,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:17:54,709 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:54,710 INFO L85 PathProgramCache]: Analyzing trace with hash 383299479, now seen corresponding path program 1 times [2022-11-20 11:17:54,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:54,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292904174] [2022-11-20 11:17:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:54,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:56,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:17:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:56,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:17:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:56,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:17:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:56,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:17:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:56,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:17:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:56,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:17:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:56,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:17:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:56,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-20 11:17:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:56,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-20 11:17:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:56,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 11:17:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 11:17:56,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:17:56,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292904174] [2022-11-20 11:17:56,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292904174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:17:56,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752043787] [2022-11-20 11:17:56,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:56,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:56,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:17:56,663 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:17:56,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:17:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:17:57,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 2670 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:17:57,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:17:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 11:17:57,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:17:57,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752043787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:17:57,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:17:57,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-11-20 11:17:57,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773333999] [2022-11-20 11:17:57,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:17:57,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:17:57,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:17:57,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:17:57,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:17:57,418 INFO L87 Difference]: Start difference. First operand 159 states and 205 transitions. Second operand has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 11:17:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:17:57,616 INFO L93 Difference]: Finished difference Result 289 states and 375 transitions. [2022-11-20 11:17:57,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:17:57,618 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 94 [2022-11-20 11:17:57,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:17:57,620 INFO L225 Difference]: With dead ends: 289 [2022-11-20 11:17:57,620 INFO L226 Difference]: Without dead ends: 169 [2022-11-20 11:17:57,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:17:57,623 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 13 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:17:57,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1155 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:17:57,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-20 11:17:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2022-11-20 11:17:57,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 117 states have internal predecessors, (131), 36 states have call successors, (36), 12 states have call predecessors, (36), 16 states have return successors, (44), 34 states have call predecessors, (44), 35 states have call successors, (44) [2022-11-20 11:17:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 211 transitions. [2022-11-20 11:17:57,674 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 211 transitions. Word has length 94 [2022-11-20 11:17:57,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:17:57,675 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 211 transitions. [2022-11-20 11:17:57,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 11:17:57,675 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 211 transitions. [2022-11-20 11:17:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 11:17:57,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:17:57,677 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:17:57,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:17:57,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:17:57,887 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:17:57,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:17:57,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1721484580, now seen corresponding path program 1 times [2022-11-20 11:17:57,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:17:57,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16177818] [2022-11-20 11:17:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:17:57,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:17:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:02,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:02,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:02,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:02,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:02,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:02,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:18:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:02,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:18:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:02,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-20 11:18:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:02,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-20 11:18:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:03,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-20 11:18:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:18:03,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:03,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16177818] [2022-11-20 11:18:03,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16177818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:03,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817363546] [2022-11-20 11:18:03,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:03,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:03,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:03,349 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:03,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:18:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:03,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:18:03,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:18:04,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:18:04,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817363546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:04,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:18:04,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [25] total 29 [2022-11-20 11:18:04,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546434947] [2022-11-20 11:18:04,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:04,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:18:04,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:04,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:18:04,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=743, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:18:04,298 INFO L87 Difference]: Start difference. First operand 164 states and 211 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:18:04,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:04,729 INFO L93 Difference]: Finished difference Result 335 states and 441 transitions. [2022-11-20 11:18:04,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:18:04,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 96 [2022-11-20 11:18:04,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:04,732 INFO L225 Difference]: With dead ends: 335 [2022-11-20 11:18:04,732 INFO L226 Difference]: Without dead ends: 196 [2022-11-20 11:18:04,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:18:04,734 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 37 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:04,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 659 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-11-20 11:18:04,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-20 11:18:04,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 172. [2022-11-20 11:18:04,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 119 states have (on average 1.1932773109243697) internal successors, (142), 125 states have internal predecessors, (142), 36 states have call successors, (36), 12 states have call predecessors, (36), 16 states have return successors, (44), 34 states have call predecessors, (44), 35 states have call successors, (44) [2022-11-20 11:18:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 222 transitions. [2022-11-20 11:18:04,756 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 222 transitions. Word has length 96 [2022-11-20 11:18:04,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:04,756 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 222 transitions. [2022-11-20 11:18:04,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:18:04,757 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 222 transitions. [2022-11-20 11:18:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 11:18:04,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:04,758 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:04,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:18:04,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:04,969 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:04,970 INFO L85 PathProgramCache]: Analyzing trace with hash -335281186, now seen corresponding path program 1 times [2022-11-20 11:18:04,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:04,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673634133] [2022-11-20 11:18:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:04,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:06,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:06,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:06,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:06,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:06,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:06,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:06,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:18:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:06,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:18:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:06,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-20 11:18:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:06,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-20 11:18:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:06,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-20 11:18:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 11:18:06,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:06,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673634133] [2022-11-20 11:18:06,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673634133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:06,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795355377] [2022-11-20 11:18:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:06,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:06,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:06,367 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:06,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:18:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:07,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 2680 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:18:07,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 11:18:07,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:18:07,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795355377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:07,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:18:07,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-20 11:18:07,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777344331] [2022-11-20 11:18:07,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:07,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:18:07,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:07,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:18:07,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:18:07,260 INFO L87 Difference]: Start difference. First operand 172 states and 222 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:18:07,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:07,526 INFO L93 Difference]: Finished difference Result 344 states and 461 transitions. [2022-11-20 11:18:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:18:07,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 96 [2022-11-20 11:18:07,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:07,530 INFO L225 Difference]: With dead ends: 344 [2022-11-20 11:18:07,530 INFO L226 Difference]: Without dead ends: 197 [2022-11-20 11:18:07,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:18:07,532 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 40 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:07,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 522 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-20 11:18:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-20 11:18:07,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 175. [2022-11-20 11:18:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 128 states have internal predecessors, (145), 36 states have call successors, (36), 12 states have call predecessors, (36), 16 states have return successors, (44), 34 states have call predecessors, (44), 35 states have call successors, (44) [2022-11-20 11:18:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 225 transitions. [2022-11-20 11:18:07,555 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 225 transitions. Word has length 96 [2022-11-20 11:18:07,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:07,556 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 225 transitions. [2022-11-20 11:18:07,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:18:07,556 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 225 transitions. [2022-11-20 11:18:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 11:18:07,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:07,559 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:07,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:18:07,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 11:18:07,771 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash -60521572, now seen corresponding path program 1 times [2022-11-20 11:18:07,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:07,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812847960] [2022-11-20 11:18:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:07,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:08,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:08,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:08,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:08,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:08,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:08,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:18:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:08,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:18:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:08,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-20 11:18:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:08,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-20 11:18:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:08,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-20 11:18:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-20 11:18:08,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:08,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812847960] [2022-11-20 11:18:08,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812847960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:08,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:18:08,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:18:08,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434396880] [2022-11-20 11:18:08,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:08,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:18:08,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:08,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:18:08,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:18:08,288 INFO L87 Difference]: Start difference. First operand 175 states and 225 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:18:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:08,705 INFO L93 Difference]: Finished difference Result 331 states and 437 transitions. [2022-11-20 11:18:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:18:08,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 96 [2022-11-20 11:18:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:08,707 INFO L225 Difference]: With dead ends: 331 [2022-11-20 11:18:08,708 INFO L226 Difference]: Without dead ends: 181 [2022-11-20 11:18:08,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:18:08,710 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 74 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:08,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 259 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:18:08,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-20 11:18:08,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 173. [2022-11-20 11:18:08,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 120 states have (on average 1.1833333333333333) internal successors, (142), 126 states have internal predecessors, (142), 36 states have call successors, (36), 12 states have call predecessors, (36), 16 states have return successors, (44), 34 states have call predecessors, (44), 35 states have call successors, (44) [2022-11-20 11:18:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 222 transitions. [2022-11-20 11:18:08,742 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 222 transitions. Word has length 96 [2022-11-20 11:18:08,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:08,742 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 222 transitions. [2022-11-20 11:18:08,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:18:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 222 transitions. [2022-11-20 11:18:08,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 11:18:08,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:08,746 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:08,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:18:08,746 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:08,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1061953058, now seen corresponding path program 1 times [2022-11-20 11:18:08,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:08,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19594373] [2022-11-20 11:18:08,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:08,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:09,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:09,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:09,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:09,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:09,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:09,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:18:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:09,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:18:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:09,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-20 11:18:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:09,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-20 11:18:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:09,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-20 11:18:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 11:18:09,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:09,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19594373] [2022-11-20 11:18:09,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19594373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:09,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020164358] [2022-11-20 11:18:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:09,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:09,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:09,987 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:10,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:18:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:10,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 2672 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 11:18:10,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:10,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:18:11,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-20 11:18:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:18:11,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:18:11,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020164358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:11,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:18:11,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 15 [2022-11-20 11:18:11,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58406716] [2022-11-20 11:18:11,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:11,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:18:11,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:11,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:18:11,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:18:11,056 INFO L87 Difference]: Start difference. First operand 173 states and 222 transitions. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 11:18:11,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:11,790 INFO L93 Difference]: Finished difference Result 363 states and 475 transitions. [2022-11-20 11:18:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:18:11,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 96 [2022-11-20 11:18:11,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:11,793 INFO L225 Difference]: With dead ends: 363 [2022-11-20 11:18:11,793 INFO L226 Difference]: Without dead ends: 229 [2022-11-20 11:18:11,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:18:11,795 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 174 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:11,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 1247 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 280 Invalid, 0 Unknown, 51 Unchecked, 0.5s Time] [2022-11-20 11:18:11,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-20 11:18:11,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 192. [2022-11-20 11:18:11,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 135 states have (on average 1.162962962962963) internal successors, (157), 142 states have internal predecessors, (157), 37 states have call successors, (37), 13 states have call predecessors, (37), 19 states have return successors, (51), 36 states have call predecessors, (51), 36 states have call successors, (51) [2022-11-20 11:18:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 245 transitions. [2022-11-20 11:18:11,820 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 245 transitions. Word has length 96 [2022-11-20 11:18:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:11,820 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 245 transitions. [2022-11-20 11:18:11,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 11:18:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 245 transitions. [2022-11-20 11:18:11,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 11:18:11,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:11,822 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:11,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:18:12,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 11:18:12,035 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:12,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:12,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1793920484, now seen corresponding path program 1 times [2022-11-20 11:18:12,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:12,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646329978] [2022-11-20 11:18:12,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:12,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:12,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:12,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:12,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:12,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:12,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:12,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:18:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:12,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:18:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:12,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-20 11:18:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:12,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-20 11:18:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:12,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-20 11:18:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 11:18:12,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:12,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646329978] [2022-11-20 11:18:12,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646329978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:12,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557106563] [2022-11-20 11:18:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:12,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:12,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:12,364 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:12,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:18:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:13,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 2669 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:18:13,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:18:13,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:18:13,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557106563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:13,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:18:13,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-20 11:18:13,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360338808] [2022-11-20 11:18:13,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:13,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:18:13,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:13,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:18:13,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:18:13,068 INFO L87 Difference]: Start difference. First operand 192 states and 245 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:18:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:13,113 INFO L93 Difference]: Finished difference Result 345 states and 444 transitions. [2022-11-20 11:18:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:18:13,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 96 [2022-11-20 11:18:13,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:13,116 INFO L225 Difference]: With dead ends: 345 [2022-11-20 11:18:13,116 INFO L226 Difference]: Without dead ends: 185 [2022-11-20 11:18:13,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:18:13,118 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 26 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:13,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 462 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 11:18:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-20 11:18:13,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 180. [2022-11-20 11:18:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 130 states have internal predecessors, (141), 37 states have call successors, (37), 13 states have call predecessors, (37), 18 states have return successors, (47), 36 states have call predecessors, (47), 36 states have call successors, (47) [2022-11-20 11:18:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 225 transitions. [2022-11-20 11:18:13,139 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 225 transitions. Word has length 96 [2022-11-20 11:18:13,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:13,140 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 225 transitions. [2022-11-20 11:18:13,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-20 11:18:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 225 transitions. [2022-11-20 11:18:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-20 11:18:13,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:13,142 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:18:13,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:18:13,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 11:18:13,353 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:13,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1638074292, now seen corresponding path program 1 times [2022-11-20 11:18:13,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:13,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805670646] [2022-11-20 11:18:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:13,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:14,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:14,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:14,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:14,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:14,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:14,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:18:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:14,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:18:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:14,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:14,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:18:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:14,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:18:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:14,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:14,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-20 11:18:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-20 11:18:14,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:14,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805670646] [2022-11-20 11:18:14,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805670646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:14,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:18:14,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:18:14,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019623117] [2022-11-20 11:18:14,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:14,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:18:14,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:14,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:18:14,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:18:14,256 INFO L87 Difference]: Start difference. First operand 180 states and 225 transitions. Second operand has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-20 11:18:15,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:15,105 INFO L93 Difference]: Finished difference Result 188 states and 233 transitions. [2022-11-20 11:18:15,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:18:15,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 100 [2022-11-20 11:18:15,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:15,107 INFO L225 Difference]: With dead ends: 188 [2022-11-20 11:18:15,108 INFO L226 Difference]: Without dead ends: 186 [2022-11-20 11:18:15,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:18:15,109 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 150 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:15,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 500 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:18:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-11-20 11:18:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2022-11-20 11:18:15,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 133 states have internal predecessors, (144), 38 states have call successors, (38), 14 states have call predecessors, (38), 19 states have return successors, (48), 37 states have call predecessors, (48), 37 states have call successors, (48) [2022-11-20 11:18:15,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 230 transitions. [2022-11-20 11:18:15,137 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 230 transitions. Word has length 100 [2022-11-20 11:18:15,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:15,139 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 230 transitions. [2022-11-20 11:18:15,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-20 11:18:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 230 transitions. [2022-11-20 11:18:15,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-20 11:18:15,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:15,142 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:15,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:18:15,143 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:15,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:15,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1497297622, now seen corresponding path program 1 times [2022-11-20 11:18:15,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:15,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434737372] [2022-11-20 11:18:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:15,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:15,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:15,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:16,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:16,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:16,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:16,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:16,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:18:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:16,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-20 11:18:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:16,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:18:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:16,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 11:18:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:16,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-20 11:18:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 11:18:16,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:16,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434737372] [2022-11-20 11:18:16,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434737372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:16,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026582471] [2022-11-20 11:18:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:16,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:16,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:16,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:16,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:18:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:16,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 2674 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:18:16,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 11:18:16,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:18:16,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026582471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:16,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:18:16,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2022-11-20 11:18:16,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440469606] [2022-11-20 11:18:16,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:16,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:18:16,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:16,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:18:16,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:18:16,960 INFO L87 Difference]: Start difference. First operand 185 states and 230 transitions. Second operand has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 11:18:17,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:17,132 INFO L93 Difference]: Finished difference Result 341 states and 425 transitions. [2022-11-20 11:18:17,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:18:17,133 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2022-11-20 11:18:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:17,138 INFO L225 Difference]: With dead ends: 341 [2022-11-20 11:18:17,138 INFO L226 Difference]: Without dead ends: 185 [2022-11-20 11:18:17,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:18:17,139 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 13 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:17,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1147 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:18:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-20 11:18:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 177. [2022-11-20 11:18:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 125 states have internal predecessors, (137), 38 states have call successors, (38), 14 states have call predecessors, (38), 18 states have return successors, (45), 37 states have call predecessors, (45), 37 states have call successors, (45) [2022-11-20 11:18:17,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 220 transitions. [2022-11-20 11:18:17,162 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 220 transitions. Word has length 100 [2022-11-20 11:18:17,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:17,162 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 220 transitions. [2022-11-20 11:18:17,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-20 11:18:17,163 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 220 transitions. [2022-11-20 11:18:17,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 11:18:17,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:17,165 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-11-20 11:18:17,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:18:17,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:18:17,377 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:17,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:17,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1094528621, now seen corresponding path program 1 times [2022-11-20 11:18:17,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:17,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750353218] [2022-11-20 11:18:17,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:17,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:19,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:19,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:19,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:19,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:19,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:19,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:18:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:19,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:18:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:19,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 11:18:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-20 11:18:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-20 11:18:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 11:18:20,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:20,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750353218] [2022-11-20 11:18:20,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750353218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:20,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:18:20,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 11:18:20,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8023006] [2022-11-20 11:18:20,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:20,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:18:20,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:20,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:18:20,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:18:20,223 INFO L87 Difference]: Start difference. First operand 177 states and 220 transitions. Second operand has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-20 11:18:21,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:21,892 INFO L93 Difference]: Finished difference Result 304 states and 376 transitions. [2022-11-20 11:18:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:18:21,893 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 102 [2022-11-20 11:18:21,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:21,895 INFO L225 Difference]: With dead ends: 304 [2022-11-20 11:18:21,895 INFO L226 Difference]: Without dead ends: 183 [2022-11-20 11:18:21,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:18:21,896 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 99 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:21,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 541 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 11:18:21,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-20 11:18:21,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-11-20 11:18:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 125 states have (on average 1.136) internal successors, (142), 131 states have internal predecessors, (142), 38 states have call successors, (38), 14 states have call predecessors, (38), 19 states have return successors, (48), 37 states have call predecessors, (48), 37 states have call successors, (48) [2022-11-20 11:18:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 228 transitions. [2022-11-20 11:18:21,917 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 228 transitions. Word has length 102 [2022-11-20 11:18:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:21,918 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 228 transitions. [2022-11-20 11:18:21,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 13 states have internal predecessors, (68), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-20 11:18:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 228 transitions. [2022-11-20 11:18:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 11:18:21,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:21,920 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-11-20 11:18:21,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:18:21,920 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:21,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1814235281, now seen corresponding path program 1 times [2022-11-20 11:18:21,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:21,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332880555] [2022-11-20 11:18:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:21,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:22,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:23,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:18:23,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:23,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:18:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:23,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 11:18:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:23,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-20 11:18:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:23,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-20 11:18:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 11:18:23,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:23,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332880555] [2022-11-20 11:18:23,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332880555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:23,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340846392] [2022-11-20 11:18:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:23,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:23,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:23,088 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:23,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:18:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:23,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 2686 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 11:18:23,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:23,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:18:24,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-20 11:18:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:18:24,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:18:24,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340846392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:24,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:18:24,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 13 [2022-11-20 11:18:24,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172772264] [2022-11-20 11:18:24,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:24,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:18:24,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:24,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:18:24,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:18:24,128 INFO L87 Difference]: Start difference. First operand 183 states and 228 transitions. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 11:18:24,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:24,563 INFO L93 Difference]: Finished difference Result 360 states and 459 transitions. [2022-11-20 11:18:24,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:18:24,564 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 102 [2022-11-20 11:18:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:24,566 INFO L225 Difference]: With dead ends: 360 [2022-11-20 11:18:24,566 INFO L226 Difference]: Without dead ends: 223 [2022-11-20 11:18:24,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:18:24,568 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 45 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:24,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1092 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-11-20 11:18:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-20 11:18:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 183. [2022-11-20 11:18:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 125 states have (on average 1.136) internal successors, (142), 131 states have internal predecessors, (142), 38 states have call successors, (38), 14 states have call predecessors, (38), 19 states have return successors, (48), 37 states have call predecessors, (48), 37 states have call successors, (48) [2022-11-20 11:18:24,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 228 transitions. [2022-11-20 11:18:24,593 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 228 transitions. Word has length 102 [2022-11-20 11:18:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:24,594 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 228 transitions. [2022-11-20 11:18:24,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 9 states have internal predecessors, (74), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 11:18:24,596 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 228 transitions. [2022-11-20 11:18:24,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 11:18:24,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:24,598 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-11-20 11:18:24,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:18:24,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:18:24,810 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:24,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:24,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1868628179, now seen corresponding path program 1 times [2022-11-20 11:18:24,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:24,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666703351] [2022-11-20 11:18:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:24,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:29,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:29,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:29,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:29,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:29,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:29,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:18:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:29,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:18:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:29,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 11:18:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:29,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-20 11:18:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:29,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-20 11:18:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-20 11:18:29,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:29,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666703351] [2022-11-20 11:18:29,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666703351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:29,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:18:29,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-20 11:18:29,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054359085] [2022-11-20 11:18:29,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:29,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:18:29,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:29,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:18:29,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:18:29,886 INFO L87 Difference]: Start difference. First operand 183 states and 228 transitions. Second operand has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 9 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-20 11:18:31,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:31,483 INFO L93 Difference]: Finished difference Result 314 states and 385 transitions. [2022-11-20 11:18:31,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:18:31,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 9 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 102 [2022-11-20 11:18:31,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:31,489 INFO L225 Difference]: With dead ends: 314 [2022-11-20 11:18:31,489 INFO L226 Difference]: Without dead ends: 195 [2022-11-20 11:18:31,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:18:31,491 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 216 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:31,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 361 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:18:31,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-20 11:18:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 187. [2022-11-20 11:18:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 129 states have (on average 1.1395348837209303) internal successors, (147), 135 states have internal predecessors, (147), 38 states have call successors, (38), 14 states have call predecessors, (38), 19 states have return successors, (48), 37 states have call predecessors, (48), 37 states have call successors, (48) [2022-11-20 11:18:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 233 transitions. [2022-11-20 11:18:31,523 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 233 transitions. Word has length 102 [2022-11-20 11:18:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:31,523 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 233 transitions. [2022-11-20 11:18:31,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 9 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-20 11:18:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 233 transitions. [2022-11-20 11:18:31,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 11:18:31,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:31,525 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-11-20 11:18:31,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 11:18:31,526 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:31,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:31,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1610462741, now seen corresponding path program 1 times [2022-11-20 11:18:31,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:31,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959445731] [2022-11-20 11:18:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:31,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:32,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:32,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:32,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:32,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:32,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:32,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:18:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:32,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:18:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:32,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 11:18:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:32,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-20 11:18:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:32,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-20 11:18:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-20 11:18:32,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:32,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959445731] [2022-11-20 11:18:32,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959445731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:32,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:18:32,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:18:32,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773560560] [2022-11-20 11:18:32,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:32,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:18:32,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:32,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:18:32,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:18:32,384 INFO L87 Difference]: Start difference. First operand 187 states and 233 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-20 11:18:32,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:32,806 INFO L93 Difference]: Finished difference Result 308 states and 379 transitions. [2022-11-20 11:18:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:18:32,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 102 [2022-11-20 11:18:32,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:32,808 INFO L225 Difference]: With dead ends: 308 [2022-11-20 11:18:32,808 INFO L226 Difference]: Without dead ends: 185 [2022-11-20 11:18:32,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:18:32,810 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 71 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:32,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 244 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:18:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-20 11:18:32,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-11-20 11:18:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 127 states have (on average 1.125984251968504) internal successors, (143), 133 states have internal predecessors, (143), 38 states have call successors, (38), 14 states have call predecessors, (38), 19 states have return successors, (48), 37 states have call predecessors, (48), 37 states have call successors, (48) [2022-11-20 11:18:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 229 transitions. [2022-11-20 11:18:32,843 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 229 transitions. Word has length 102 [2022-11-20 11:18:32,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:32,843 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 229 transitions. [2022-11-20 11:18:32,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-20 11:18:32,844 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 229 transitions. [2022-11-20 11:18:32,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-20 11:18:32,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:32,846 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:18:32,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 11:18:32,846 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:32,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash -63505454, now seen corresponding path program 1 times [2022-11-20 11:18:32,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:32,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073181037] [2022-11-20 11:18:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:32,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:18:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-20 11:18:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:18:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:18:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-20 11:18:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 11:18:34,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:34,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073181037] [2022-11-20 11:18:34,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073181037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:34,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519718195] [2022-11-20 11:18:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:34,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:34,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:34,827 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:34,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:18:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:35,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 2678 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 11:18:35,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:35,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-20 11:18:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 32 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:18:35,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:36,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-11-20 11:18:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 11:18:36,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519718195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:18:36,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:18:36,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 27 [2022-11-20 11:18:36,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265238976] [2022-11-20 11:18:36,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:36,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 11:18:36,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:36,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 11:18:36,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:18:36,590 INFO L87 Difference]: Start difference. First operand 185 states and 229 transitions. Second operand has 27 states, 25 states have (on average 4.88) internal successors, (122), 21 states have internal predecessors, (122), 10 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-11-20 11:18:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:38,671 INFO L93 Difference]: Finished difference Result 380 states and 455 transitions. [2022-11-20 11:18:38,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:18:38,672 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 4.88) internal successors, (122), 21 states have internal predecessors, (122), 10 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) Word has length 104 [2022-11-20 11:18:38,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:38,674 INFO L225 Difference]: With dead ends: 380 [2022-11-20 11:18:38,674 INFO L226 Difference]: Without dead ends: 216 [2022-11-20 11:18:38,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 218 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 11:18:38,676 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 310 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:38,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 875 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1882 Invalid, 0 Unknown, 215 Unchecked, 1.6s Time] [2022-11-20 11:18:38,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-20 11:18:38,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2022-11-20 11:18:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 151 states have (on average 1.1125827814569536) internal successors, (168), 158 states have internal predecessors, (168), 38 states have call successors, (38), 16 states have call predecessors, (38), 22 states have return successors, (46), 37 states have call predecessors, (46), 37 states have call successors, (46) [2022-11-20 11:18:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2022-11-20 11:18:38,705 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 104 [2022-11-20 11:18:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:38,705 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2022-11-20 11:18:38,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 4.88) internal successors, (122), 21 states have internal predecessors, (122), 10 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-11-20 11:18:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2022-11-20 11:18:38,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-20 11:18:38,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:38,708 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-11-20 11:18:38,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:18:38,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 11:18:38,919 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:38,919 INFO L85 PathProgramCache]: Analyzing trace with hash -335461550, now seen corresponding path program 1 times [2022-11-20 11:18:38,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:38,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099072258] [2022-11-20 11:18:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:38,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:39,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:39,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:39,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:39,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:39,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:39,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:18:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:39,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:18:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:39,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 11:18:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:39,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-20 11:18:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:39,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-20 11:18:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-20 11:18:39,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:39,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099072258] [2022-11-20 11:18:39,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099072258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:39,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:18:39,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 11:18:39,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157559947] [2022-11-20 11:18:39,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:39,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:18:39,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:39,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:18:39,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:18:39,996 INFO L87 Difference]: Start difference. First operand 212 states and 252 transitions. Second operand has 11 states, 10 states have (on average 5.4) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-20 11:18:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:40,795 INFO L93 Difference]: Finished difference Result 226 states and 267 transitions. [2022-11-20 11:18:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:18:40,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 104 [2022-11-20 11:18:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:40,798 INFO L225 Difference]: With dead ends: 226 [2022-11-20 11:18:40,798 INFO L226 Difference]: Without dead ends: 224 [2022-11-20 11:18:40,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:18:40,799 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 89 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:40,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 650 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:18:40,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-20 11:18:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2022-11-20 11:18:40,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 159 states have (on average 1.1069182389937107) internal successors, (176), 167 states have internal predecessors, (176), 39 states have call successors, (39), 17 states have call predecessors, (39), 24 states have return successors, (49), 38 states have call predecessors, (49), 38 states have call successors, (49) [2022-11-20 11:18:40,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2022-11-20 11:18:40,825 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 104 [2022-11-20 11:18:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:40,826 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2022-11-20 11:18:40,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.4) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-20 11:18:40,826 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2022-11-20 11:18:40,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-20 11:18:40,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:40,830 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2022-11-20 11:18:40,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 11:18:40,831 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:40,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:40,832 INFO L85 PathProgramCache]: Analyzing trace with hash 365603028, now seen corresponding path program 1 times [2022-11-20 11:18:40,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:40,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448648118] [2022-11-20 11:18:40,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:40,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:42,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:42,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:42,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:42,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:42,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:42,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:18:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:42,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:18:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:42,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 11:18:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:42,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-20 11:18:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:42,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-11-20 11:18:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-20 11:18:42,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:42,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448648118] [2022-11-20 11:18:42,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448648118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:18:42,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:18:42,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 11:18:42,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209806932] [2022-11-20 11:18:42,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:18:42,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:18:42,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:42,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:18:42,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:18:42,569 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-20 11:18:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:18:43,774 INFO L93 Difference]: Finished difference Result 230 states and 270 transitions. [2022-11-20 11:18:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:18:43,774 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 104 [2022-11-20 11:18:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:18:43,776 INFO L225 Difference]: With dead ends: 230 [2022-11-20 11:18:43,776 INFO L226 Difference]: Without dead ends: 228 [2022-11-20 11:18:43,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:18:43,778 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 107 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:18:43,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 759 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 11:18:43,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-20 11:18:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 216. [2022-11-20 11:18:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 154 states have (on average 1.1103896103896105) internal successors, (171), 161 states have internal predecessors, (171), 38 states have call successors, (38), 17 states have call predecessors, (38), 23 states have return successors, (46), 37 states have call predecessors, (46), 37 states have call successors, (46) [2022-11-20 11:18:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 255 transitions. [2022-11-20 11:18:43,804 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 255 transitions. Word has length 104 [2022-11-20 11:18:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:18:43,805 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 255 transitions. [2022-11-20 11:18:43,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 11 states have internal predecessors, (54), 2 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-20 11:18:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 255 transitions. [2022-11-20 11:18:43,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-20 11:18:43,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:18:43,807 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:18:43,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 11:18:43,808 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:18:43,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:18:43,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1502069968, now seen corresponding path program 1 times [2022-11-20 11:18:43,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:18:43,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851191834] [2022-11-20 11:18:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:43,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:18:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:46,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:18:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:46,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:18:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:46,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:18:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:46,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:46,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:18:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:46,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:18:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:46,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:18:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:46,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:18:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:46,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:18:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:46,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:18:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:46,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:18:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:46,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:18:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:18:47,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:18:47,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851191834] [2022-11-20 11:18:47,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851191834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:47,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20920110] [2022-11-20 11:18:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:18:47,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:18:47,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:18:47,202 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:18:47,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:18:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:18:47,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 2696 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 11:18:47,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:18:47,815 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:18:48,265 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:18:48,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 11:18:48,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:18:49,142 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-20 11:18:49,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 29 treesize of output 37 [2022-11-20 11:18:49,286 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-11-20 11:18:49,287 INFO L350 Elim1Store]: Elim1 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 22 [2022-11-20 11:18:49,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:18:49,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:18:49,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:18:49,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-20 11:18:49,615 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-20 11:18:49,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:18:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:18:54,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:18:54,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20920110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:18:54,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:18:54,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24] total 39 [2022-11-20 11:18:54,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450581336] [2022-11-20 11:18:54,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:18:54,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 11:18:54,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:18:54,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 11:18:54,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1714, Unknown=7, NotChecked=0, Total=1892 [2022-11-20 11:18:54,782 INFO L87 Difference]: Start difference. First operand 216 states and 255 transitions. Second operand has 39 states, 37 states have (on average 3.7027027027027026) internal successors, (137), 34 states have internal predecessors, (137), 15 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2022-11-20 11:19:03,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:03,122 INFO L93 Difference]: Finished difference Result 359 states and 441 transitions. [2022-11-20 11:19:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 11:19:03,123 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 3.7027027027027026) internal successors, (137), 34 states have internal predecessors, (137), 15 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) Word has length 116 [2022-11-20 11:19:03,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:03,126 INFO L225 Difference]: With dead ends: 359 [2022-11-20 11:19:03,126 INFO L226 Difference]: Without dead ends: 271 [2022-11-20 11:19:03,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 138 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=324, Invalid=3085, Unknown=13, NotChecked=0, Total=3422 [2022-11-20 11:19:03,128 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 315 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1287 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:03,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1424 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1020 Invalid, 0 Unknown, 1287 Unchecked, 1.1s Time] [2022-11-20 11:19:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-11-20 11:19:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 243. [2022-11-20 11:19:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 172 states have (on average 1.0988372093023255) internal successors, (189), 180 states have internal predecessors, (189), 44 states have call successors, (44), 20 states have call predecessors, (44), 26 states have return successors, (56), 42 states have call predecessors, (56), 43 states have call successors, (56) [2022-11-20 11:19:03,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 289 transitions. [2022-11-20 11:19:03,161 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 289 transitions. Word has length 116 [2022-11-20 11:19:03,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:03,161 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 289 transitions. [2022-11-20 11:19:03,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 3.7027027027027026) internal successors, (137), 34 states have internal predecessors, (137), 15 states have call successors, (25), 9 states have call predecessors, (25), 10 states have return successors, (24), 12 states have call predecessors, (24), 14 states have call successors, (24) [2022-11-20 11:19:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 289 transitions. [2022-11-20 11:19:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-20 11:19:03,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:03,164 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:03,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:19:03,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:03,371 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:03,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash -333479690, now seen corresponding path program 1 times [2022-11-20 11:19:03,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:03,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907390203] [2022-11-20 11:19:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:03,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:05,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:19:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:05,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:19:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:05,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:19:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:05,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:19:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:05,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:19:05,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:05,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:19:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:05,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:19:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:06,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:19:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:06,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:19:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:06,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:19:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:06,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:19:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:06,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:19:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 11:19:06,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:06,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907390203] [2022-11-20 11:19:06,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907390203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:06,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:06,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-20 11:19:06,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877693994] [2022-11-20 11:19:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:06,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:19:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:06,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:19:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:19:06,474 INFO L87 Difference]: Start difference. First operand 243 states and 289 transitions. Second operand has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 16 states have internal predecessors, (66), 7 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-20 11:19:09,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:09,005 INFO L93 Difference]: Finished difference Result 351 states and 436 transitions. [2022-11-20 11:19:09,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:19:09,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 16 states have internal predecessors, (66), 7 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 116 [2022-11-20 11:19:09,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:09,008 INFO L225 Difference]: With dead ends: 351 [2022-11-20 11:19:09,008 INFO L226 Difference]: Without dead ends: 282 [2022-11-20 11:19:09,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-11-20 11:19:09,018 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 152 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:09,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 477 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2117 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 11:19:09,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-20 11:19:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 253. [2022-11-20 11:19:09,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 179 states have (on average 1.094972067039106) internal successors, (196), 188 states have internal predecessors, (196), 45 states have call successors, (45), 20 states have call predecessors, (45), 28 states have return successors, (63), 44 states have call predecessors, (63), 44 states have call successors, (63) [2022-11-20 11:19:09,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 304 transitions. [2022-11-20 11:19:09,065 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 304 transitions. Word has length 116 [2022-11-20 11:19:09,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:09,066 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 304 transitions. [2022-11-20 11:19:09,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 16 states have internal predecessors, (66), 7 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-20 11:19:09,067 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 304 transitions. [2022-11-20 11:19:09,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-20 11:19:09,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:09,070 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:09,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-20 11:19:09,070 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:09,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:09,071 INFO L85 PathProgramCache]: Analyzing trace with hash -75314252, now seen corresponding path program 1 times [2022-11-20 11:19:09,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:09,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299353539] [2022-11-20 11:19:09,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:09,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:09,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:19:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:09,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:19:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:09,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:19:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:09,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:19:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:09,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:19:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:09,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:19:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:09,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:19:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:09,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:19:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:09,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:19:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:09,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:19:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:09,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:19:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:09,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:19:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 11:19:09,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:09,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299353539] [2022-11-20 11:19:09,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299353539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:09,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:09,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:19:09,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312403892] [2022-11-20 11:19:09,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:09,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:19:09,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:09,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:19:09,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:19:09,778 INFO L87 Difference]: Start difference. First operand 253 states and 304 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-20 11:19:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:10,309 INFO L93 Difference]: Finished difference Result 322 states and 388 transitions. [2022-11-20 11:19:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:19:10,310 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 116 [2022-11-20 11:19:10,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:10,312 INFO L225 Difference]: With dead ends: 322 [2022-11-20 11:19:10,312 INFO L226 Difference]: Without dead ends: 246 [2022-11-20 11:19:10,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:19:10,313 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 165 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:10,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 237 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:19:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-20 11:19:10,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2022-11-20 11:19:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 173 states have (on average 1.092485549132948) internal successors, (189), 181 states have internal predecessors, (189), 45 states have call successors, (45), 20 states have call predecessors, (45), 27 states have return successors, (60), 44 states have call predecessors, (60), 44 states have call successors, (60) [2022-11-20 11:19:10,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2022-11-20 11:19:10,355 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 116 [2022-11-20 11:19:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:10,356 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2022-11-20 11:19:10,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-20 11:19:10,356 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2022-11-20 11:19:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-20 11:19:10,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:10,358 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:19:10,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 11:19:10,358 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:10,359 INFO L85 PathProgramCache]: Analyzing trace with hash -663036306, now seen corresponding path program 1 times [2022-11-20 11:19:10,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:10,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485202166] [2022-11-20 11:19:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:10,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:12,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:19:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:12,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:19:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:12,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:19:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:12,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:19:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:12,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:19:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:12,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:19:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:12,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:19:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:12,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:19:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:12,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:19:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:12,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:19:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:12,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:19:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:12,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:19:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 11:19:12,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:12,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485202166] [2022-11-20 11:19:12,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485202166] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:12,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627631585] [2022-11-20 11:19:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:12,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:12,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:12,627 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:12,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:19:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:13,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 2701 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 11:19:13,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:13,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-20 11:19:14,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-20 11:19:14,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-20 11:19:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 11:19:14,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:19:14,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627631585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:14,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:19:14,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 27 [2022-11-20 11:19:14,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734088324] [2022-11-20 11:19:14,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:14,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:19:14,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:14,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:19:14,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:19:14,353 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 11 states have internal predecessors, (77), 6 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-20 11:19:15,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:15,025 INFO L93 Difference]: Finished difference Result 400 states and 482 transitions. [2022-11-20 11:19:15,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:19:15,025 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 11 states have internal predecessors, (77), 6 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 116 [2022-11-20 11:19:15,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:15,027 INFO L225 Difference]: With dead ends: 400 [2022-11-20 11:19:15,027 INFO L226 Difference]: Without dead ends: 263 [2022-11-20 11:19:15,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:19:15,029 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 208 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:15,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 832 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 369 Invalid, 0 Unknown, 246 Unchecked, 0.5s Time] [2022-11-20 11:19:15,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-20 11:19:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 235. [2022-11-20 11:19:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 168 states have (on average 1.0892857142857142) internal successors, (183), 175 states have internal predecessors, (183), 40 states have call successors, (40), 19 states have call predecessors, (40), 26 states have return successors, (54), 40 states have call predecessors, (54), 39 states have call successors, (54) [2022-11-20 11:19:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 277 transitions. [2022-11-20 11:19:15,060 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 277 transitions. Word has length 116 [2022-11-20 11:19:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:15,060 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 277 transitions. [2022-11-20 11:19:15,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 11 states have internal predecessors, (77), 6 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-20 11:19:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 277 transitions. [2022-11-20 11:19:15,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-20 11:19:15,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:15,062 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:19:15,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:19:15,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 11:19:15,274 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:15,274 INFO L85 PathProgramCache]: Analyzing trace with hash 286245061, now seen corresponding path program 1 times [2022-11-20 11:19:15,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:15,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701296154] [2022-11-20 11:19:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:15,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:17,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:19:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:17,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:19:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:17,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:19:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:17,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:19:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:17,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:19:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:17,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:19:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:17,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:19:17,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:17,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:19:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:17,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:19:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:17,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-20 11:19:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:17,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:19:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:17,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:19:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:17,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-20 11:19:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-20 11:19:17,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:17,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701296154] [2022-11-20 11:19:17,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701296154] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:17,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712678891] [2022-11-20 11:19:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:17,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:17,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:17,662 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:17,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:19:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:18,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 2737 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-20 11:19:18,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:18,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:19:18,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-20 11:19:23,418 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:19:23,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-20 11:19:23,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-20 11:19:23,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:19:23,439 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 23 [2022-11-20 11:19:25,764 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:19:25,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2022-11-20 11:19:25,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:19:25,774 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 23 [2022-11-20 11:19:25,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-20 11:19:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 11:19:26,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:19:27,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712678891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:27,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:19:27,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 43 [2022-11-20 11:19:27,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463572587] [2022-11-20 11:19:27,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:19:27,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 11:19:27,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:27,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 11:19:27,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2463, Unknown=6, NotChecked=0, Total=2652 [2022-11-20 11:19:27,999 INFO L87 Difference]: Start difference. First operand 235 states and 277 transitions. Second operand has 43 states, 40 states have (on average 3.3) internal successors, (132), 35 states have internal predecessors, (132), 19 states have call successors, (27), 8 states have call predecessors, (27), 11 states have return successors, (26), 14 states have call predecessors, (26), 19 states have call successors, (26) [2022-11-20 11:19:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:38,410 INFO L93 Difference]: Finished difference Result 373 states and 435 transitions. [2022-11-20 11:19:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:19:38,411 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 3.3) internal successors, (132), 35 states have internal predecessors, (132), 19 states have call successors, (27), 8 states have call predecessors, (27), 11 states have return successors, (26), 14 states have call predecessors, (26), 19 states have call successors, (26) Word has length 117 [2022-11-20 11:19:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:38,413 INFO L225 Difference]: With dead ends: 373 [2022-11-20 11:19:38,413 INFO L226 Difference]: Without dead ends: 244 [2022-11-20 11:19:38,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 171 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=542, Invalid=5455, Unknown=9, NotChecked=0, Total=6006 [2022-11-20 11:19:38,416 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 354 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 2685 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 3284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:38,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 1285 Invalid, 3284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2685 Invalid, 0 Unknown, 499 Unchecked, 2.4s Time] [2022-11-20 11:19:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-20 11:19:38,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 236. [2022-11-20 11:19:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 170 states have (on average 1.088235294117647) internal successors, (185), 177 states have internal predecessors, (185), 38 states have call successors, (38), 20 states have call predecessors, (38), 27 states have return successors, (51), 38 states have call predecessors, (51), 37 states have call successors, (51) [2022-11-20 11:19:38,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 274 transitions. [2022-11-20 11:19:38,446 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 274 transitions. Word has length 117 [2022-11-20 11:19:38,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:38,446 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 274 transitions. [2022-11-20 11:19:38,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 3.3) internal successors, (132), 35 states have internal predecessors, (132), 19 states have call successors, (27), 8 states have call predecessors, (27), 11 states have return successors, (26), 14 states have call predecessors, (26), 19 states have call successors, (26) [2022-11-20 11:19:38,447 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 274 transitions. [2022-11-20 11:19:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-20 11:19:38,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:38,448 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:19:38,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:19:38,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 11:19:38,658 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:38,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1522802117, now seen corresponding path program 1 times [2022-11-20 11:19:38,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:38,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807270044] [2022-11-20 11:19:38,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:38,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:39,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:19:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:39,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:19:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:39,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:19:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:39,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:19:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:39,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:19:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:39,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:19:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:39,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:19:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:39,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:19:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:39,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:19:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:39,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:19:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:39,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:19:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:39,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:19:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 11:19:39,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:39,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807270044] [2022-11-20 11:19:39,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807270044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:39,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:39,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 11:19:39,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13505604] [2022-11-20 11:19:39,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:39,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:19:39,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:39,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:19:39,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:19:39,758 INFO L87 Difference]: Start difference. First operand 236 states and 274 transitions. Second operand has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-20 11:19:40,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:40,542 INFO L93 Difference]: Finished difference Result 244 states and 282 transitions. [2022-11-20 11:19:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:19:40,542 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) Word has length 118 [2022-11-20 11:19:40,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:40,544 INFO L225 Difference]: With dead ends: 244 [2022-11-20 11:19:40,544 INFO L226 Difference]: Without dead ends: 242 [2022-11-20 11:19:40,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:19:40,546 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 162 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:40,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 630 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:19:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-20 11:19:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 236. [2022-11-20 11:19:40,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 170 states have (on average 1.088235294117647) internal successors, (185), 177 states have internal predecessors, (185), 38 states have call successors, (38), 20 states have call predecessors, (38), 27 states have return successors, (51), 38 states have call predecessors, (51), 37 states have call successors, (51) [2022-11-20 11:19:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 274 transitions. [2022-11-20 11:19:40,579 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 274 transitions. Word has length 118 [2022-11-20 11:19:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:40,579 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 274 transitions. [2022-11-20 11:19:40,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 8 states have internal predecessors, (58), 2 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-20 11:19:40,580 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 274 transitions. [2022-11-20 11:19:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-20 11:19:40,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:40,581 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:19:40,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-20 11:19:40,582 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:40,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:40,582 INFO L85 PathProgramCache]: Analyzing trace with hash -821737539, now seen corresponding path program 1 times [2022-11-20 11:19:40,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:40,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012734563] [2022-11-20 11:19:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:40,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:19:42,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:19:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:19:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:19:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:19:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:19:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:42,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:19:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:43,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:19:43,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:43,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:19:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:43,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:19:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:43,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:19:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:43,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:19:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 11:19:43,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:43,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012734563] [2022-11-20 11:19:43,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012734563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:19:43,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:19:43,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-20 11:19:43,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387410567] [2022-11-20 11:19:43,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:19:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:19:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:19:43,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:19:43,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:19:43,652 INFO L87 Difference]: Start difference. First operand 236 states and 274 transitions. Second operand has 18 states, 17 states have (on average 4.0) internal successors, (68), 15 states have internal predecessors, (68), 7 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-20 11:19:45,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:19:45,923 INFO L93 Difference]: Finished difference Result 334 states and 404 transitions. [2022-11-20 11:19:45,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:19:45,924 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.0) internal successors, (68), 15 states have internal predecessors, (68), 7 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 118 [2022-11-20 11:19:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:19:45,926 INFO L225 Difference]: With dead ends: 334 [2022-11-20 11:19:45,926 INFO L226 Difference]: Without dead ends: 265 [2022-11-20 11:19:45,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:19:45,929 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 194 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 2175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:19:45,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 461 Invalid, 2175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 11:19:45,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-11-20 11:19:45,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 236. [2022-11-20 11:19:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 170 states have (on average 1.088235294117647) internal successors, (185), 177 states have internal predecessors, (185), 38 states have call successors, (38), 20 states have call predecessors, (38), 27 states have return successors, (49), 38 states have call predecessors, (49), 37 states have call successors, (49) [2022-11-20 11:19:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 272 transitions. [2022-11-20 11:19:45,965 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 272 transitions. Word has length 118 [2022-11-20 11:19:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:19:45,966 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 272 transitions. [2022-11-20 11:19:45,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.0) internal successors, (68), 15 states have internal predecessors, (68), 7 states have call successors, (13), 4 states have call predecessors, (13), 5 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-20 11:19:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 272 transitions. [2022-11-20 11:19:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-20 11:19:45,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:19:45,968 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:19:45,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-20 11:19:45,969 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:19:45,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:19:45,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1722213330, now seen corresponding path program 1 times [2022-11-20 11:19:45,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:19:45,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450928611] [2022-11-20 11:19:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:45,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:19:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:19:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:19:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:19:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:19:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:19:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:19:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:19:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:19:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:47,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:19:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:48,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:19:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:48,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:19:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:48,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:19:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:48,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-20 11:19:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-20 11:19:48,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:19:48,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450928611] [2022-11-20 11:19:48,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450928611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:19:48,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952247283] [2022-11-20 11:19:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:19:48,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:19:48,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:19:48,336 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:19:48,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:19:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:19:49,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 2751 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-20 11:19:49,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:19:49,017 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:19:49,339 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:19:49,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 11:19:50,030 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:19:50,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 11:19:50,112 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 19 [2022-11-20 11:19:52,345 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 19 [2022-11-20 11:19:54,682 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-20 11:19:54,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 94 [2022-11-20 11:19:54,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-11-20 11:19:54,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-11-20 11:19:54,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-20 11:19:54,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-11-20 11:19:57,300 INFO L321 Elim1Store]: treesize reduction 89, result has 27.6 percent of original size [2022-11-20 11:19:57,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 94 [2022-11-20 11:19:57,378 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-20 11:19:57,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 54 [2022-11-20 11:19:57,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-11-20 11:19:57,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:19:57,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:19:57,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-11-20 11:19:57,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-11-20 11:19:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 44 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 11:19:59,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:20:02,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952247283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:02,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:20:02,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 34 [2022-11-20 11:20:02,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695515736] [2022-11-20 11:20:02,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:20:02,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:20:02,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:02,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:20:02,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1078, Unknown=9, NotChecked=0, Total=1190 [2022-11-20 11:20:02,205 INFO L87 Difference]: Start difference. First operand 236 states and 272 transitions. Second operand has 34 states, 31 states have (on average 4.483870967741935) internal successors, (139), 28 states have internal predecessors, (139), 15 states have call successors, (27), 10 states have call predecessors, (27), 12 states have return successors, (26), 11 states have call predecessors, (26), 15 states have call successors, (26) [2022-11-20 11:20:15,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:15,179 INFO L93 Difference]: Finished difference Result 447 states and 529 transitions. [2022-11-20 11:20:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 11:20:15,180 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 4.483870967741935) internal successors, (139), 28 states have internal predecessors, (139), 15 states have call successors, (27), 10 states have call predecessors, (27), 12 states have return successors, (26), 11 states have call predecessors, (26), 15 states have call successors, (26) Word has length 123 [2022-11-20 11:20:15,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:15,182 INFO L225 Difference]: With dead ends: 447 [2022-11-20 11:20:15,183 INFO L226 Difference]: Without dead ends: 309 [2022-11-20 11:20:15,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 146 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=242, Invalid=2497, Unknown=17, NotChecked=0, Total=2756 [2022-11-20 11:20:15,185 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 164 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1118 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:15,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1694 Invalid, 3053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1848 Invalid, 0 Unknown, 1118 Unchecked, 1.9s Time] [2022-11-20 11:20:15,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-11-20 11:20:15,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 225. [2022-11-20 11:20:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 163 states have (on average 1.0920245398773005) internal successors, (178), 169 states have internal predecessors, (178), 36 states have call successors, (36), 20 states have call predecessors, (36), 25 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2022-11-20 11:20:15,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 255 transitions. [2022-11-20 11:20:15,225 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 255 transitions. Word has length 123 [2022-11-20 11:20:15,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:15,226 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 255 transitions. [2022-11-20 11:20:15,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 4.483870967741935) internal successors, (139), 28 states have internal predecessors, (139), 15 states have call successors, (27), 10 states have call predecessors, (27), 12 states have return successors, (26), 11 states have call predecessors, (26), 15 states have call successors, (26) [2022-11-20 11:20:15,226 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 255 transitions. [2022-11-20 11:20:15,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-20 11:20:15,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:15,228 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:15,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:20:15,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:15,440 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:15,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:15,441 INFO L85 PathProgramCache]: Analyzing trace with hash -706686607, now seen corresponding path program 1 times [2022-11-20 11:20:15,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:15,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765988587] [2022-11-20 11:20:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:15,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:20:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:20:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:20:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:20:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:20:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:20:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:20:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:20:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:20:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:20:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-20 11:20:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-20 11:20:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-20 11:20:15,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:15,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765988587] [2022-11-20 11:20:15,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765988587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:15,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:15,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:20:15,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163256800] [2022-11-20 11:20:15,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:15,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:20:15,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:15,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:20:15,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:20:15,950 INFO L87 Difference]: Start difference. First operand 225 states and 255 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-20 11:20:16,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:16,488 INFO L93 Difference]: Finished difference Result 272 states and 312 transitions. [2022-11-20 11:20:16,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:20:16,488 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 130 [2022-11-20 11:20:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:16,490 INFO L225 Difference]: With dead ends: 272 [2022-11-20 11:20:16,491 INFO L226 Difference]: Without dead ends: 225 [2022-11-20 11:20:16,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:20:16,492 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 92 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:16,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 236 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:20:16,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-20 11:20:16,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-11-20 11:20:16,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 163 states have (on average 1.0858895705521472) internal successors, (177), 169 states have internal predecessors, (177), 36 states have call successors, (36), 20 states have call predecessors, (36), 25 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2022-11-20 11:20:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 254 transitions. [2022-11-20 11:20:16,526 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 254 transitions. Word has length 130 [2022-11-20 11:20:16,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:16,526 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 254 transitions. [2022-11-20 11:20:16,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-20 11:20:16,527 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 254 transitions. [2022-11-20 11:20:16,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-20 11:20:16,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:16,528 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:16,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-20 11:20:16,529 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:16,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:16,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2040989381, now seen corresponding path program 1 times [2022-11-20 11:20:16,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:16,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161316242] [2022-11-20 11:20:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:16,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:17,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:17,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:17,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:20:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:17,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:20:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:17,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:20:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:17,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:20:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:17,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:20:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:17,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:20:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:17,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:20:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:17,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:20:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:17,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:20:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:17,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:20:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:17,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:20:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-20 11:20:17,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:17,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161316242] [2022-11-20 11:20:17,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161316242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:17,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:17,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:20:17,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489517541] [2022-11-20 11:20:17,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:17,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:20:17,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:17,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:20:17,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:20:17,464 INFO L87 Difference]: Start difference. First operand 225 states and 254 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-20 11:20:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:18,211 INFO L93 Difference]: Finished difference Result 350 states and 400 transitions. [2022-11-20 11:20:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:20:18,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 4 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 129 [2022-11-20 11:20:18,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:18,214 INFO L225 Difference]: With dead ends: 350 [2022-11-20 11:20:18,214 INFO L226 Difference]: Without dead ends: 225 [2022-11-20 11:20:18,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:20:18,215 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 71 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:18,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 306 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:20:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-20 11:20:18,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-11-20 11:20:18,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 163 states have (on average 1.0797546012269938) internal successors, (176), 169 states have internal predecessors, (176), 36 states have call successors, (36), 20 states have call predecessors, (36), 25 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2022-11-20 11:20:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 253 transitions. [2022-11-20 11:20:18,251 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 253 transitions. Word has length 129 [2022-11-20 11:20:18,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:18,251 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 253 transitions. [2022-11-20 11:20:18,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 5 states have internal predecessors, (64), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-20 11:20:18,252 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 253 transitions. [2022-11-20 11:20:18,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-20 11:20:18,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:18,253 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:20:18,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-20 11:20:18,254 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:18,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:18,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1646622595, now seen corresponding path program 1 times [2022-11-20 11:20:18,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:18,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482447103] [2022-11-20 11:20:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:18,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:20:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:20:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:20:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:20:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:20:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:20:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:20:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:20:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:20,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:20:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:21,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:20:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:21,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:20:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-20 11:20:21,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:21,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482447103] [2022-11-20 11:20:21,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482447103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:20:21,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:20:21,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-11-20 11:20:21,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349781196] [2022-11-20 11:20:21,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:20:21,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 11:20:21,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:20:21,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 11:20:21,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:20:21,517 INFO L87 Difference]: Start difference. First operand 225 states and 253 transitions. Second operand has 21 states, 20 states have (on average 3.7) internal successors, (74), 18 states have internal predecessors, (74), 7 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-20 11:20:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:20:24,872 INFO L93 Difference]: Finished difference Result 335 states and 392 transitions. [2022-11-20 11:20:24,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 11:20:24,873 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.7) internal successors, (74), 18 states have internal predecessors, (74), 7 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 129 [2022-11-20 11:20:24,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:20:24,875 INFO L225 Difference]: With dead ends: 335 [2022-11-20 11:20:24,875 INFO L226 Difference]: Without dead ends: 247 [2022-11-20 11:20:24,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:20:24,877 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 199 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 2634 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 2700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:20:24,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 985 Invalid, 2700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2634 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 11:20:24,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-20 11:20:24,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 219. [2022-11-20 11:20:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 158 states have (on average 1.0696202531645569) internal successors, (169), 163 states have internal predecessors, (169), 36 states have call successors, (36), 20 states have call predecessors, (36), 24 states have return successors, (40), 35 states have call predecessors, (40), 35 states have call successors, (40) [2022-11-20 11:20:24,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 245 transitions. [2022-11-20 11:20:24,914 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 245 transitions. Word has length 129 [2022-11-20 11:20:24,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:20:24,915 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 245 transitions. [2022-11-20 11:20:24,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.7) internal successors, (74), 18 states have internal predecessors, (74), 7 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-11-20 11:20:24,915 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 245 transitions. [2022-11-20 11:20:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-20 11:20:24,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:20:24,917 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:20:24,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-11-20 11:20:24,918 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:20:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:20:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash 366758917, now seen corresponding path program 1 times [2022-11-20 11:20:24,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:20:24,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068782581] [2022-11-20 11:20:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:24,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:20:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:20:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:20:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:20:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:20:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:20:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:20:28,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:20:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:20:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:20:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:20:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:20:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:20:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:28,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:20:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 11:20:29,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:20:29,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068782581] [2022-11-20 11:20:29,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068782581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:20:29,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97929565] [2022-11-20 11:20:29,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:20:29,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:20:29,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:20:29,126 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:20:29,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:20:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:20:29,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 2768 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 11:20:29,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:20:29,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:20:32,270 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:20:32,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-11-20 11:20:32,351 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:20:32,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-11-20 11:20:47,097 INFO L321 Elim1Store]: treesize reduction 187, result has 32.5 percent of original size [2022-11-20 11:20:47,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 156 [2022-11-20 11:20:47,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-20 11:20:47,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-20 11:20:47,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-11-20 11:20:47,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-11-20 11:20:49,715 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((aux_div_v_arrayElimCell_48_45 Int) (v_DerPreprocessor_3 (Array Int Int)) (|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse3 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (.cse0 (select v_DerPreprocessor_3 0)) (.cse4 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|)) (.cse1 (* aux_div_v_arrayElimCell_48_45 18446744073709551616)) (.cse2 (select (select (store |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| v_DerPreprocessor_3) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|) 16))) (and (= .cse0 (select v_DerPreprocessor_3 8)) (<= .cse1 .cse2) (= (select .cse3 0) (select .cse4 0)) (< .cse2 (+ 18446744073709551616 .cse1)) (= (select .cse3 16) .cse2) (= .cse0 (select .cse4 8)) (not (= .cse1 .cse2))))) (exists ((aux_div_v_arrayElimCell_48_45 Int) (|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int)) (let ((.cse5 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|))) (let ((.cse7 (* aux_div_v_arrayElimCell_48_45 18446744073709551616)) (.cse6 (select .cse5 24))) (and (= (select .cse5 8) (select .cse5 0)) (< .cse6 (+ 18446744073709551616 .cse7)) (not (= .cse6 .cse7)) (<= .cse7 .cse6))))) (exists ((|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse8 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|))) (= (select .cse8 0) (select .cse8 (- 8))))) (exists ((v_DerPreprocessor_3 (Array Int Int))) (let ((.cse9 (select v_DerPreprocessor_3 0))) (and (= .cse9 (select v_DerPreprocessor_3 8)) (exists ((|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int)) (let ((.cse16 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|))) (and (exists ((aux_div_v_arrayElimCell_48_45 Int) (|v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse12 (select (store |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| v_DerPreprocessor_3) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (.cse14 (+ 16 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|))) (let ((.cse11 (select .cse16 0)) (.cse10 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (.cse13 (select .cse12 .cse14)) (.cse15 (* aux_div_v_arrayElimCell_48_45 18446744073709551616))) (and (= (select .cse10 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|) .cse11) (not (= 8 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|)) (= (select .cse12 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|) .cse11) (= .cse13 (select .cse10 .cse14)) (< .cse13 (+ 18446744073709551616 .cse15)) (<= .cse15 .cse13) (not (= .cse13 .cse15)))))) (= .cse9 (select .cse16 8)))))))) (exists ((|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse17 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|))) (= (select .cse17 0) (select .cse17 (- 16))))) (exists ((v_DerPreprocessor_3 (Array Int Int))) (let ((.cse18 (select v_DerPreprocessor_3 0))) (and (= .cse18 (select v_DerPreprocessor_3 8)) (exists ((|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int)) (let ((.cse19 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|))) (and (= .cse18 (select .cse19 8)) (exists ((aux_div_v_arrayElimCell_48_45 Int) (|v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse20 (select (store |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| v_DerPreprocessor_3) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|))) (let ((.cse21 (select .cse20 (+ 16 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|))) (.cse22 (* aux_div_v_arrayElimCell_48_45 18446744073709551616))) (and (not (= |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (= (select .cse20 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|) (select .cse19 0)) (< .cse21 (+ 18446744073709551616 .cse22)) (<= .cse22 .cse21) (not (= .cse21 .cse22))))))))))))) is different from true [2022-11-20 11:20:52,228 WARN L859 $PredicateComparison]: unable to prove that (and (not (= (mod (select (select |c_old(#memory_int)| |c_aws_byte_cursor_from_buf_#in~buf.base|) (+ |c_aws_byte_cursor_from_buf_#in~buf.offset| 16)) 18446744073709551616) 0)) (exists ((|aws_byte_cursor_from_buf_~#cur~0.base| Int) (v_ArrVal_3012 Int)) (= (store |c_old(#memory_int)| |aws_byte_cursor_from_buf_~#cur~0.base| (let ((.cse0 (store (select |c_old(#memory_int)| |aws_byte_cursor_from_buf_~#cur~0.base|) 8 v_ArrVal_3012))) (store .cse0 0 (select (select (store |c_old(#memory_int)| |aws_byte_cursor_from_buf_~#cur~0.base| .cse0) |c_aws_byte_cursor_from_buf_#in~buf.base|) |c_aws_byte_cursor_from_buf_#in~buf.offset|)))) |c_#memory_int|)) (or (exists ((aux_div_v_arrayElimCell_48_45 Int) (v_DerPreprocessor_3 (Array Int Int)) (|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse4 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (.cse1 (select v_DerPreprocessor_3 0)) (.cse5 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|)) (.cse2 (* aux_div_v_arrayElimCell_48_45 18446744073709551616)) (.cse3 (select (select (store |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| v_DerPreprocessor_3) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|) 16))) (and (= .cse1 (select v_DerPreprocessor_3 8)) (<= .cse2 .cse3) (= (select .cse4 0) (select .cse5 0)) (< .cse3 (+ 18446744073709551616 .cse2)) (= (select .cse4 16) .cse3) (= .cse1 (select .cse5 8)) (not (= .cse2 .cse3))))) (exists ((aux_div_v_arrayElimCell_48_45 Int) (|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int)) (let ((.cse6 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|))) (let ((.cse8 (* aux_div_v_arrayElimCell_48_45 18446744073709551616)) (.cse7 (select .cse6 24))) (and (= (select .cse6 8) (select .cse6 0)) (< .cse7 (+ 18446744073709551616 .cse8)) (not (= .cse7 .cse8)) (<= .cse8 .cse7))))) (exists ((|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse9 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|))) (= (select .cse9 0) (select .cse9 (- 8))))) (exists ((v_DerPreprocessor_3 (Array Int Int))) (let ((.cse10 (select v_DerPreprocessor_3 0))) (and (= .cse10 (select v_DerPreprocessor_3 8)) (exists ((|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int)) (let ((.cse17 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|))) (and (exists ((aux_div_v_arrayElimCell_48_45 Int) (|v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse13 (select (store |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| v_DerPreprocessor_3) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (.cse15 (+ 16 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|))) (let ((.cse12 (select .cse17 0)) (.cse11 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (.cse14 (select .cse13 .cse15)) (.cse16 (* aux_div_v_arrayElimCell_48_45 18446744073709551616))) (and (= (select .cse11 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|) .cse12) (not (= 8 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|)) (= (select .cse13 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|) .cse12) (= .cse14 (select .cse11 .cse15)) (< .cse14 (+ 18446744073709551616 .cse16)) (<= .cse16 .cse14) (not (= .cse14 .cse16)))))) (= .cse10 (select .cse17 8)))))))) (exists ((|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse18 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|))) (= (select .cse18 0) (select .cse18 (- 16))))) (exists ((v_DerPreprocessor_3 (Array Int Int))) (let ((.cse19 (select v_DerPreprocessor_3 0))) (and (= .cse19 (select v_DerPreprocessor_3 8)) (exists ((|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int)) (let ((.cse20 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|))) (and (= .cse19 (select .cse20 8)) (exists ((aux_div_v_arrayElimCell_48_45 Int) (|v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse21 (select (store |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| v_DerPreprocessor_3) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|))) (let ((.cse22 (select .cse21 (+ 16 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|))) (.cse23 (* aux_div_v_arrayElimCell_48_45 18446744073709551616))) (and (not (= |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (= (select .cse21 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|) (select .cse20 0)) (< .cse22 (+ 18446744073709551616 .cse23)) (<= .cse23 .cse22) (not (= .cse22 .cse23)))))))))))))) is different from true [2022-11-20 11:20:52,546 INFO L321 Elim1Store]: treesize reduction 187, result has 32.5 percent of original size [2022-11-20 11:20:52,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 156 [2022-11-20 11:20:52,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2022-11-20 11:20:52,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-11-20 11:20:53,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-11-20 11:20:53,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2022-11-20 11:20:53,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-20 11:20:53,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-20 11:20:55,384 WARN L859 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24| Int)) (let ((.cse0 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|))) (= (select .cse0 0) (select .cse0 (- 8))))) (exists ((v_DerPreprocessor_4 (Array Int Int))) (let ((.cse1 (select v_DerPreprocessor_4 8))) (and (= (select v_DerPreprocessor_4 0) .cse1) (exists ((|aws_byte_cursor_from_buf_~#cur~0.base| Int)) (let ((.cse8 (select |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base|))) (and (exists ((v_prenex_16 Int) (|v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24| Int)) (let ((.cse7 (select (store |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base| v_DerPreprocessor_4) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|)) (.cse5 (+ 16 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24|))) (let ((.cse4 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|)) (.cse6 (select .cse8 0)) (.cse3 (select .cse7 .cse5)) (.cse2 (* 18446744073709551616 v_prenex_16))) (and (<= .cse2 .cse3) (= (select .cse4 .cse5) .cse3) (= (select .cse4 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24|) .cse6) (not (= 8 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24|)) (not (= .cse2 .cse3)) (= (select .cse7 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24|) .cse6) (< .cse3 (+ 18446744073709551616 .cse2)))))) (= (select .cse8 8) .cse1))))))) (exists ((v_prenex_16 Int) (|aws_byte_cursor_from_buf_~#cur~0.base| Int) (v_DerPreprocessor_4 (Array Int Int)) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24| Int)) (let ((.cse12 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|)) (.cse13 (select |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base|)) (.cse11 (select v_DerPreprocessor_4 8)) (.cse10 (* 18446744073709551616 v_prenex_16)) (.cse9 (select (select (store |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base| v_DerPreprocessor_4) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|) 16))) (and (< .cse9 (+ 18446744073709551616 .cse10)) (not (= .cse9 .cse10)) (= (select v_DerPreprocessor_4 0) .cse11) (= (select .cse12 16) .cse9) (= (select .cse12 0) (select .cse13 0)) (= (select .cse13 8) .cse11) (<= .cse10 .cse9)))) (exists ((aux_div_v_arrayElimCell_59_45 Int) (|aws_byte_cursor_from_buf_~#cur~0.base| Int)) (let ((.cse16 (select |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base|))) (let ((.cse15 (select .cse16 24)) (.cse14 (* aux_div_v_arrayElimCell_59_45 18446744073709551616))) (and (not (= .cse14 .cse15)) (<= .cse14 .cse15) (= (select .cse16 8) (select .cse16 0)) (< .cse15 (+ .cse14 18446744073709551616)))))) (exists ((v_DerPreprocessor_4 (Array Int Int))) (let ((.cse20 (select v_DerPreprocessor_4 8))) (and (exists ((|aws_byte_cursor_from_buf_~#cur~0.base| Int)) (let ((.cse19 (select |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base|))) (and (exists ((v_prenex_16 Int) (|v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24| Int)) (let ((.cse18 (select (select (store |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base| v_DerPreprocessor_4) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|) (+ 16 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24|))) (.cse17 (* 18446744073709551616 v_prenex_16))) (and (not (= |aws_byte_cursor_from_buf_~#cur~0.base| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|)) (<= .cse17 .cse18) (= (select (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|) |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24|) (select .cse19 0)) (not (= .cse17 .cse18)) (< .cse18 (+ 18446744073709551616 .cse17))))) (= (select .cse19 8) .cse20)))) (= (select v_DerPreprocessor_4 0) .cse20)))) (exists ((|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24| Int)) (let ((.cse21 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|))) (= (select .cse21 0) (select .cse21 (- 16)))))) (or (exists ((aux_div_v_arrayElimCell_48_45 Int) (v_DerPreprocessor_3 (Array Int Int)) (|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse25 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (.cse22 (select v_DerPreprocessor_3 0)) (.cse26 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|)) (.cse23 (* aux_div_v_arrayElimCell_48_45 18446744073709551616)) (.cse24 (select (select (store |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| v_DerPreprocessor_3) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|) 16))) (and (= .cse22 (select v_DerPreprocessor_3 8)) (<= .cse23 .cse24) (= (select .cse25 0) (select .cse26 0)) (< .cse24 (+ 18446744073709551616 .cse23)) (= (select .cse25 16) .cse24) (= .cse22 (select .cse26 8)) (not (= .cse23 .cse24))))) (exists ((aux_div_v_arrayElimCell_48_45 Int) (|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int)) (let ((.cse27 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|))) (let ((.cse29 (* aux_div_v_arrayElimCell_48_45 18446744073709551616)) (.cse28 (select .cse27 24))) (and (= (select .cse27 8) (select .cse27 0)) (< .cse28 (+ 18446744073709551616 .cse29)) (not (= .cse28 .cse29)) (<= .cse29 .cse28))))) (exists ((|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse30 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|))) (= (select .cse30 0) (select .cse30 (- 8))))) (exists ((v_DerPreprocessor_3 (Array Int Int))) (let ((.cse31 (select v_DerPreprocessor_3 0))) (and (= .cse31 (select v_DerPreprocessor_3 8)) (exists ((|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int)) (let ((.cse38 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|))) (and (exists ((aux_div_v_arrayElimCell_48_45 Int) (|v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse34 (select (store |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| v_DerPreprocessor_3) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (.cse36 (+ 16 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|))) (let ((.cse33 (select .cse38 0)) (.cse32 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (.cse35 (select .cse34 .cse36)) (.cse37 (* aux_div_v_arrayElimCell_48_45 18446744073709551616))) (and (= (select .cse32 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|) .cse33) (not (= 8 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|)) (= (select .cse34 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|) .cse33) (= .cse35 (select .cse32 .cse36)) (< .cse35 (+ 18446744073709551616 .cse37)) (<= .cse37 .cse35) (not (= .cse35 .cse37)))))) (= .cse31 (select .cse38 8)))))))) (exists ((|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse39 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|))) (= (select .cse39 0) (select .cse39 (- 16))))) (exists ((v_DerPreprocessor_3 (Array Int Int))) (let ((.cse40 (select v_DerPreprocessor_3 0))) (and (= .cse40 (select v_DerPreprocessor_3 8)) (exists ((|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int)) (let ((.cse41 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|))) (and (= .cse40 (select .cse41 8)) (exists ((aux_div_v_arrayElimCell_48_45 Int) (|v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse42 (select (store |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| v_DerPreprocessor_3) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|))) (let ((.cse43 (select .cse42 (+ 16 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|))) (.cse44 (* aux_div_v_arrayElimCell_48_45 18446744073709551616))) (and (not (= |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (= (select .cse42 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|) (select .cse41 0)) (< .cse43 (+ 18446744073709551616 .cse44)) (<= .cse44 .cse43) (not (= .cse43 .cse44)))))))))))))) is different from true [2022-11-20 11:20:56,793 WARN L859 $PredicateComparison]: unable to prove that (and (not (= (mod (select (select |c_old(#memory_int)| |c_aws_byte_cursor_from_buf_#in~buf.base|) (+ |c_aws_byte_cursor_from_buf_#in~buf.offset| 16)) 18446744073709551616) 0)) (exists ((|aws_byte_cursor_from_buf_~#cur~0.base| Int) (v_ArrVal_3012 Int)) (= (store |c_old(#memory_int)| |aws_byte_cursor_from_buf_~#cur~0.base| (let ((.cse0 (store (select |c_old(#memory_int)| |aws_byte_cursor_from_buf_~#cur~0.base|) 8 v_ArrVal_3012))) (store .cse0 0 (select (select (store |c_old(#memory_int)| |aws_byte_cursor_from_buf_~#cur~0.base| .cse0) |c_aws_byte_cursor_from_buf_#in~buf.base|) |c_aws_byte_cursor_from_buf_#in~buf.offset|)))) |c_#memory_int|)) (or (exists ((|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24| Int)) (let ((.cse1 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|))) (= (select .cse1 0) (select .cse1 (- 8))))) (exists ((v_DerPreprocessor_4 (Array Int Int))) (let ((.cse2 (select v_DerPreprocessor_4 8))) (and (= (select v_DerPreprocessor_4 0) .cse2) (exists ((|aws_byte_cursor_from_buf_~#cur~0.base| Int)) (let ((.cse9 (select |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base|))) (and (exists ((v_prenex_16 Int) (|v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24| Int)) (let ((.cse8 (select (store |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base| v_DerPreprocessor_4) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|)) (.cse6 (+ 16 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24|))) (let ((.cse5 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|)) (.cse7 (select .cse9 0)) (.cse4 (select .cse8 .cse6)) (.cse3 (* 18446744073709551616 v_prenex_16))) (and (<= .cse3 .cse4) (= (select .cse5 .cse6) .cse4) (= (select .cse5 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24|) .cse7) (not (= 8 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24|)) (not (= .cse3 .cse4)) (= (select .cse8 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24|) .cse7) (< .cse4 (+ 18446744073709551616 .cse3)))))) (= (select .cse9 8) .cse2))))))) (exists ((v_prenex_16 Int) (|aws_byte_cursor_from_buf_~#cur~0.base| Int) (v_DerPreprocessor_4 (Array Int Int)) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24| Int)) (let ((.cse13 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|)) (.cse14 (select |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base|)) (.cse12 (select v_DerPreprocessor_4 8)) (.cse11 (* 18446744073709551616 v_prenex_16)) (.cse10 (select (select (store |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base| v_DerPreprocessor_4) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|) 16))) (and (< .cse10 (+ 18446744073709551616 .cse11)) (not (= .cse10 .cse11)) (= (select v_DerPreprocessor_4 0) .cse12) (= (select .cse13 16) .cse10) (= (select .cse13 0) (select .cse14 0)) (= (select .cse14 8) .cse12) (<= .cse11 .cse10)))) (exists ((aux_div_v_arrayElimCell_59_45 Int) (|aws_byte_cursor_from_buf_~#cur~0.base| Int)) (let ((.cse17 (select |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base|))) (let ((.cse16 (select .cse17 24)) (.cse15 (* aux_div_v_arrayElimCell_59_45 18446744073709551616))) (and (not (= .cse15 .cse16)) (<= .cse15 .cse16) (= (select .cse17 8) (select .cse17 0)) (< .cse16 (+ .cse15 18446744073709551616)))))) (exists ((v_DerPreprocessor_4 (Array Int Int))) (let ((.cse21 (select v_DerPreprocessor_4 8))) (and (exists ((|aws_byte_cursor_from_buf_~#cur~0.base| Int)) (let ((.cse20 (select |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base|))) (and (exists ((v_prenex_16 Int) (|v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24| Int)) (let ((.cse19 (select (select (store |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base| v_DerPreprocessor_4) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|) (+ 16 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24|))) (.cse18 (* 18446744073709551616 v_prenex_16))) (and (not (= |aws_byte_cursor_from_buf_~#cur~0.base| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|)) (<= .cse18 .cse19) (= (select (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|) |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_24|) (select .cse20 0)) (not (= .cse18 .cse19)) (< .cse19 (+ 18446744073709551616 .cse18))))) (= (select .cse20 8) .cse21)))) (= (select v_DerPreprocessor_4 0) .cse21)))) (exists ((|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24| Int)) (let ((.cse22 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_24|))) (= (select .cse22 0) (select .cse22 (- 16)))))) (or (exists ((aux_div_v_arrayElimCell_48_45 Int) (v_DerPreprocessor_3 (Array Int Int)) (|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse26 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (.cse23 (select v_DerPreprocessor_3 0)) (.cse27 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|)) (.cse24 (* aux_div_v_arrayElimCell_48_45 18446744073709551616)) (.cse25 (select (select (store |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| v_DerPreprocessor_3) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|) 16))) (and (= .cse23 (select v_DerPreprocessor_3 8)) (<= .cse24 .cse25) (= (select .cse26 0) (select .cse27 0)) (< .cse25 (+ 18446744073709551616 .cse24)) (= (select .cse26 16) .cse25) (= .cse23 (select .cse27 8)) (not (= .cse24 .cse25))))) (exists ((aux_div_v_arrayElimCell_48_45 Int) (|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int)) (let ((.cse28 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|))) (let ((.cse30 (* aux_div_v_arrayElimCell_48_45 18446744073709551616)) (.cse29 (select .cse28 24))) (and (= (select .cse28 8) (select .cse28 0)) (< .cse29 (+ 18446744073709551616 .cse30)) (not (= .cse29 .cse30)) (<= .cse30 .cse29))))) (exists ((|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse31 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|))) (= (select .cse31 0) (select .cse31 (- 8))))) (exists ((v_DerPreprocessor_3 (Array Int Int))) (let ((.cse32 (select v_DerPreprocessor_3 0))) (and (= .cse32 (select v_DerPreprocessor_3 8)) (exists ((|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int)) (let ((.cse39 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|))) (and (exists ((aux_div_v_arrayElimCell_48_45 Int) (|v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse35 (select (store |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| v_DerPreprocessor_3) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (.cse37 (+ 16 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|))) (let ((.cse34 (select .cse39 0)) (.cse33 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (.cse36 (select .cse35 .cse37)) (.cse38 (* aux_div_v_arrayElimCell_48_45 18446744073709551616))) (and (= (select .cse33 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|) .cse34) (not (= 8 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|)) (= (select .cse35 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|) .cse34) (= .cse36 (select .cse33 .cse37)) (< .cse36 (+ 18446744073709551616 .cse38)) (<= .cse38 .cse36) (not (= .cse36 .cse38)))))) (= .cse32 (select .cse39 8)))))))) (exists ((|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse40 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|))) (= (select .cse40 0) (select .cse40 (- 16))))) (exists ((v_DerPreprocessor_3 (Array Int Int))) (let ((.cse41 (select v_DerPreprocessor_3 0))) (and (= .cse41 (select v_DerPreprocessor_3 8)) (exists ((|v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| Int)) (let ((.cse42 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2|))) (and (= .cse41 (select .cse42 8)) (exists ((aux_div_v_arrayElimCell_48_45 Int) (|v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23| Int)) (let ((.cse43 (select (store |c_#memory_int| |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| v_DerPreprocessor_3) |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|))) (let ((.cse44 (select .cse43 (+ 16 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|))) (.cse45 (* aux_div_v_arrayElimCell_48_45 18446744073709551616))) (and (not (= |v_aws_byte_cursor_from_buf_~#cur~0.base_BEFORE_CALL_2| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_23|)) (= (select .cse43 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_23|) (select .cse42 0)) (< .cse44 (+ 18446744073709551616 .cse45)) (<= .cse45 .cse44) (not (= .cse44 .cse45)))))))))))))) is different from true [2022-11-20 11:20:57,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:20:57,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:20:57,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:20:57,758 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:20:57,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2022-11-20 11:21:13,940 WARN L233 SmtUtils]: Spent 15.19s on a formula simplification. DAG size of input: 166 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:21:37,717 WARN L233 SmtUtils]: Spent 9.57s on a formula simplification. DAG size of input: 92 DAG size of output: 18 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:21:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:21:38,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:21:45,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97929565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:21:45,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:21:45,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 45 [2022-11-20 11:21:45,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124448131] [2022-11-20 11:21:45,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:21:45,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 11:21:45,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:21:45,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 11:21:45,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1847, Unknown=33, NotChecked=364, Total=2450 [2022-11-20 11:21:45,118 INFO L87 Difference]: Start difference. First operand 219 states and 245 transitions. Second operand has 45 states, 40 states have (on average 4.025) internal successors, (161), 38 states have internal predecessors, (161), 20 states have call successors, (27), 10 states have call predecessors, (27), 12 states have return successors, (26), 17 states have call predecessors, (26), 19 states have call successors, (26) [2022-11-20 11:22:40,984 WARN L233 SmtUtils]: Spent 18.94s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:23:03,495 WARN L233 SmtUtils]: Spent 14.16s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:23:47,788 WARN L233 SmtUtils]: Spent 26.97s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:24:16,777 WARN L233 SmtUtils]: Spent 19.00s on a formula simplification. DAG size of input: 184 DAG size of output: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:24:52,393 WARN L233 SmtUtils]: Spent 28.71s on a formula simplification. DAG size of input: 179 DAG size of output: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:25:03,620 WARN L233 SmtUtils]: Spent 8.63s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:25:04,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:25:04,891 INFO L93 Difference]: Finished difference Result 355 states and 410 transitions. [2022-11-20 11:25:04,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 11:25:04,892 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 40 states have (on average 4.025) internal successors, (161), 38 states have internal predecessors, (161), 20 states have call successors, (27), 10 states have call predecessors, (27), 12 states have return successors, (26), 17 states have call predecessors, (26), 19 states have call successors, (26) Word has length 129 [2022-11-20 11:25:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:25:04,895 INFO L225 Difference]: With dead ends: 355 [2022-11-20 11:25:04,895 INFO L226 Difference]: Without dead ends: 261 [2022-11-20 11:25:04,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 264.2s TimeCoverageRelationStatistics Valid=529, Invalid=4358, Unknown=99, NotChecked=564, Total=5550 [2022-11-20 11:25:04,897 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 459 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 3882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1378 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:25:04,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 576 Invalid, 3882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2262 Invalid, 0 Unknown, 1378 Unchecked, 2.7s Time] [2022-11-20 11:25:04,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-20 11:25:04,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 221. [2022-11-20 11:25:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 159 states have (on average 1.069182389937107) internal successors, (170), 164 states have internal predecessors, (170), 36 states have call successors, (36), 21 states have call predecessors, (36), 25 states have return successors, (39), 35 states have call predecessors, (39), 35 states have call successors, (39) [2022-11-20 11:25:04,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 245 transitions. [2022-11-20 11:25:04,937 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 245 transitions. Word has length 129 [2022-11-20 11:25:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:25:04,938 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 245 transitions. [2022-11-20 11:25:04,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 40 states have (on average 4.025) internal successors, (161), 38 states have internal predecessors, (161), 20 states have call successors, (27), 10 states have call predecessors, (27), 12 states have return successors, (26), 17 states have call predecessors, (26), 19 states have call successors, (26) [2022-11-20 11:25:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 245 transitions. [2022-11-20 11:25:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-20 11:25:04,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:25:04,940 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:25:04,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:25:05,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-20 11:25:05,140 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:25:05,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:25:05,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1479754423, now seen corresponding path program 1 times [2022-11-20 11:25:05,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:25:05,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394183194] [2022-11-20 11:25:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:05,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:25:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:10,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:25:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:10,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:25:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:10,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:25:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:10,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:25:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:10,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:25:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:11,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:25:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:11,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:25:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:11,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:25:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:12,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:25:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:12,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:25:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:12,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:25:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:12,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:25:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:12,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:25:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-20 11:25:12,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:25:12,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394183194] [2022-11-20 11:25:12,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394183194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:25:12,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641089462] [2022-11-20 11:25:12,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:25:12,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:25:12,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:25:12,794 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:25:12,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 11:25:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:25:13,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 2770 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-20 11:25:13,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:25:13,681 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:25:14,236 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:25:14,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 11:25:14,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:25:15,298 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-20 11:25:15,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 20 treesize of output 30 [2022-11-20 11:25:15,376 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:25:15,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2022-11-20 11:25:15,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-20 11:25:15,813 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:25:15,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 44 [2022-11-20 11:25:15,852 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:25:15,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 11:25:18,609 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_26| Int) (|v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_26| Int)) (let ((.cse0 (select |c_#memory_int| |v_aws_byte_cursor_from_buf_#in~buf.base_BEFORE_CALL_26|))) (<= (mod (select .cse0 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_26|) 18446744073709551616) (mod (select .cse0 (+ 16 |v_aws_byte_cursor_from_buf_#in~buf.offset_BEFORE_CALL_26|)) 18446744073709551616)))) is different from true [2022-11-20 11:25:18,985 INFO L321 Elim1Store]: treesize reduction 40, result has 18.4 percent of original size [2022-11-20 11:25:18,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 67 [2022-11-20 11:25:18,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 11:25:19,035 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2022-11-20 11:25:19,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 38 [2022-11-20 11:25:19,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2022-11-20 11:25:19,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-20 11:25:19,544 INFO L321 Elim1Store]: treesize reduction 40, result has 18.4 percent of original size [2022-11-20 11:25:19,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 67 [2022-11-20 11:25:19,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 11:25:19,602 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2022-11-20 11:25:19,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 38 [2022-11-20 11:25:19,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-20 11:25:19,689 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-11-20 11:25:19,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 15 [2022-11-20 11:25:19,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 31 [2022-11-20 11:25:19,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-11-20 11:25:19,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:25:19,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:25:19,901 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 29 [2022-11-20 11:25:19,913 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 11 [2022-11-20 11:25:19,937 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 11:25:19,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 11:25:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 45 refuted. 0 times theorem prover too weak. 4 trivial. 12 not checked. [2022-11-20 11:25:36,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:25:38,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641089462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:25:38,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:25:38,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32] total 52 [2022-11-20 11:25:38,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374936032] [2022-11-20 11:25:38,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:25:38,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 11:25:38,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:25:38,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 11:25:38,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2906, Unknown=27, NotChecked=110, Total=3306 [2022-11-20 11:25:38,144 INFO L87 Difference]: Start difference. First operand 221 states and 245 transitions. Second operand has 52 states, 49 states have (on average 3.2653061224489797) internal successors, (160), 45 states have internal predecessors, (160), 18 states have call successors, (25), 10 states have call predecessors, (25), 13 states have return successors, (25), 14 states have call predecessors, (25), 17 states have call successors, (25) [2022-11-20 11:26:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:13,871 INFO L93 Difference]: Finished difference Result 300 states and 337 transitions. [2022-11-20 11:26:13,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 11:26:13,873 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 3.2653061224489797) internal successors, (160), 45 states have internal predecessors, (160), 18 states have call successors, (25), 10 states have call predecessors, (25), 13 states have return successors, (25), 14 states have call predecessors, (25), 17 states have call successors, (25) Word has length 129 [2022-11-20 11:26:13,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:13,875 INFO L225 Difference]: With dead ends: 300 [2022-11-20 11:26:13,875 INFO L226 Difference]: Without dead ends: 226 [2022-11-20 11:26:13,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 141 SyntacticMatches, 14 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2529 ImplicationChecksByTransitivity, 56.3s TimeCoverageRelationStatistics Valid=511, Invalid=5762, Unknown=51, NotChecked=156, Total=6480 [2022-11-20 11:26:13,878 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 121 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1404 SdHoareTripleChecker+Invalid, 2634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1301 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:13,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 1404 Invalid, 2634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1288 Invalid, 0 Unknown, 1301 Unchecked, 1.9s Time] [2022-11-20 11:26:13,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-20 11:26:13,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 216. [2022-11-20 11:26:13,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 155 states have (on average 1.064516129032258) internal successors, (165), 159 states have internal predecessors, (165), 36 states have call successors, (36), 21 states have call predecessors, (36), 24 states have return successors, (38), 35 states have call predecessors, (38), 35 states have call successors, (38) [2022-11-20 11:26:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 239 transitions. [2022-11-20 11:26:13,911 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 239 transitions. Word has length 129 [2022-11-20 11:26:13,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:13,911 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 239 transitions. [2022-11-20 11:26:13,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 3.2653061224489797) internal successors, (160), 45 states have internal predecessors, (160), 18 states have call successors, (25), 10 states have call predecessors, (25), 13 states have return successors, (25), 14 states have call predecessors, (25), 17 states have call successors, (25) [2022-11-20 11:26:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 239 transitions. [2022-11-20 11:26:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-20 11:26:13,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:13,912 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:26:13,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 11:26:14,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:26:14,115 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:26:14,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:14,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1831713034, now seen corresponding path program 1 times [2022-11-20 11:26:14,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:26:14,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418567702] [2022-11-20 11:26:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:14,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:26:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:26:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:26:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:26:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:26:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:26:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:26:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:26:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:26:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:26:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:26:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:26:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:26:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-20 11:26:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-20 11:26:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 11:26:14,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:26:14,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418567702] [2022-11-20 11:26:14,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418567702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:26:14,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:26:14,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:26:14,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203327854] [2022-11-20 11:26:14,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:26:14,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:26:14,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:26:14,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:26:14,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:26:14,889 INFO L87 Difference]: Start difference. First operand 216 states and 239 transitions. Second operand has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-20 11:26:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:15,812 INFO L93 Difference]: Finished difference Result 224 states and 247 transitions. [2022-11-20 11:26:15,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:26:15,812 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 132 [2022-11-20 11:26:15,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:15,814 INFO L225 Difference]: With dead ends: 224 [2022-11-20 11:26:15,814 INFO L226 Difference]: Without dead ends: 222 [2022-11-20 11:26:15,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:26:15,815 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 71 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:15,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 533 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:26:15,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-20 11:26:15,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2022-11-20 11:26:15,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 158 states have (on average 1.0632911392405062) internal successors, (168), 162 states have internal predecessors, (168), 37 states have call successors, (37), 22 states have call predecessors, (37), 25 states have return successors, (39), 36 states have call predecessors, (39), 36 states have call successors, (39) [2022-11-20 11:26:15,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 244 transitions. [2022-11-20 11:26:15,857 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 244 transitions. Word has length 132 [2022-11-20 11:26:15,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:15,858 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 244 transitions. [2022-11-20 11:26:15,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (15), 4 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-20 11:26:15,858 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 244 transitions. [2022-11-20 11:26:15,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-20 11:26:15,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:15,859 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:26:15,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-20 11:26:15,860 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:26:15,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:15,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1414839120, now seen corresponding path program 1 times [2022-11-20 11:26:15,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:26:15,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018656710] [2022-11-20 11:26:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:15,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:26:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:19,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:26:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:19,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:26:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:19,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:26:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:19,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:26:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:19,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:26:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:19,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:26:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:19,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:26:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:19,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:26:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:20,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:26:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:20,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:26:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:20,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:26:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:20,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:26:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:20,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:26:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 11:26:21,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:26:21,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018656710] [2022-11-20 11:26:21,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018656710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:26:21,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153687322] [2022-11-20 11:26:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:21,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:26:21,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:26:21,485 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:26:21,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 11:26:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:22,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 2780 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-20 11:26:22,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:22,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:26:22,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:26:22,933 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:26:22,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-20 11:26:22,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 11:26:22,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:26:23,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:26:23,063 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 11:26:23,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 28 [2022-11-20 11:26:23,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:26:23,437 INFO L321 Elim1Store]: treesize reduction 55, result has 25.7 percent of original size [2022-11-20 11:26:23,437 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 20 treesize of output 34 [2022-11-20 11:26:23,478 INFO L321 Elim1Store]: treesize reduction 55, result has 25.7 percent of original size [2022-11-20 11:26:23,478 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 20 treesize of output 34 [2022-11-20 11:26:24,852 INFO L321 Elim1Store]: treesize reduction 55, result has 25.7 percent of original size [2022-11-20 11:26:24,853 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 20 treesize of output 34 [2022-11-20 11:26:24,904 INFO L321 Elim1Store]: treesize reduction 55, result has 25.7 percent of original size [2022-11-20 11:26:24,905 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 20 treesize of output 34 [2022-11-20 11:26:24,964 INFO L321 Elim1Store]: treesize reduction 55, result has 25.7 percent of original size [2022-11-20 11:26:24,964 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 20 treesize of output 34 [2022-11-20 11:26:25,013 INFO L321 Elim1Store]: treesize reduction 55, result has 25.7 percent of original size [2022-11-20 11:26:25,014 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 20 treesize of output 34 [2022-11-20 11:26:28,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:26:28,384 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-20 11:26:28,385 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 20 treesize of output 24 [2022-11-20 11:26:28,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:26:28,406 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-20 11:26:28,407 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 20 treesize of output 24 [2022-11-20 11:26:28,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:26:28,445 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-20 11:26:28,445 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 20 treesize of output 24 [2022-11-20 11:26:28,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:26:28,467 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-20 11:26:28,468 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 20 treesize of output 24 [2022-11-20 11:26:32,994 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:26:32,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2022-11-20 11:26:33,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:26:33,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-11-20 11:26:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 11:26:33,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:26:35,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153687322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:26:35,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:26:35,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 37] total 58 [2022-11-20 11:26:35,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126601014] [2022-11-20 11:26:35,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:26:35,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 11:26:35,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:26:35,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 11:26:35,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4472, Unknown=14, NotChecked=0, Total=4692 [2022-11-20 11:26:35,801 INFO L87 Difference]: Start difference. First operand 221 states and 244 transitions. Second operand has 58 states, 53 states have (on average 3.0754716981132075) internal successors, (163), 48 states have internal predecessors, (163), 13 states have call successors, (25), 7 states have call predecessors, (25), 11 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-20 11:26:48,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:26:48,417 INFO L93 Difference]: Finished difference Result 285 states and 323 transitions. [2022-11-20 11:26:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-20 11:26:48,418 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 53 states have (on average 3.0754716981132075) internal successors, (163), 48 states have internal predecessors, (163), 13 states have call successors, (25), 7 states have call predecessors, (25), 11 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) Word has length 131 [2022-11-20 11:26:48,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:26:48,420 INFO L225 Difference]: With dead ends: 285 [2022-11-20 11:26:48,420 INFO L226 Difference]: Without dead ends: 283 [2022-11-20 11:26:48,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 133 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=538, Invalid=11218, Unknown=16, NotChecked=0, Total=11772 [2022-11-20 11:26:48,423 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 238 mSDsluCounter, 2159 mSDsCounter, 0 mSdLazyCounter, 3649 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 2265 SdHoareTripleChecker+Invalid, 4607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 793 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:26:48,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 2265 Invalid, 4607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 3649 Invalid, 0 Unknown, 793 Unchecked, 4.4s Time] [2022-11-20 11:26:48,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-20 11:26:48,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 237. [2022-11-20 11:26:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 174 states have (on average 1.0632183908045978) internal successors, (185), 178 states have internal predecessors, (185), 36 states have call successors, (36), 23 states have call predecessors, (36), 26 states have return successors, (37), 35 states have call predecessors, (37), 35 states have call successors, (37) [2022-11-20 11:26:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 258 transitions. [2022-11-20 11:26:48,467 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 258 transitions. Word has length 131 [2022-11-20 11:26:48,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:26:48,467 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 258 transitions. [2022-11-20 11:26:48,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 53 states have (on average 3.0754716981132075) internal successors, (163), 48 states have internal predecessors, (163), 13 states have call successors, (25), 7 states have call predecessors, (25), 11 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-20 11:26:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 258 transitions. [2022-11-20 11:26:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-20 11:26:48,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:26:48,468 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:26:48,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 11:26:48,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:26:48,669 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:26:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:26:48,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1252402178, now seen corresponding path program 1 times [2022-11-20 11:26:48,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:26:48,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594118704] [2022-11-20 11:26:48,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:48,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:26:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:49,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:26:49,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:49,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:26:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:49,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:26:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:49,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:26:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:49,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:26:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:49,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:26:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:49,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:26:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:50,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:26:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:50,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:26:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:50,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:26:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:50,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:26:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:50,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:26:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:50,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-20 11:26:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:50,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-20 11:26:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-20 11:26:50,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:26:50,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594118704] [2022-11-20 11:26:50,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594118704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:26:50,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973745891] [2022-11-20 11:26:50,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:26:50,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:26:50,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:26:50,453 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:26:50,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 11:26:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:26:52,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 2742 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-20 11:26:52,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:26:52,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-20 11:26:52,845 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3513 Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_byte_cursor_from_buf_~#cur~0.base| (store (store (select |c_old(#memory_$Pointer$.base)| |c_aws_byte_cursor_from_buf_~#cur~0.base|) (+ 8 |c_aws_byte_cursor_from_buf_~#cur~0.offset|) (select (select |c_old(#memory_$Pointer$.base)| |c_aws_byte_cursor_from_buf_#in~buf.base|) (+ |c_aws_byte_cursor_from_buf_#in~buf.offset| 8))) |c_aws_byte_cursor_from_buf_~#cur~0.offset| v_ArrVal_3513)))) is different from true [2022-11-20 11:26:52,887 INFO L321 Elim1Store]: treesize reduction 55, result has 25.7 percent of original size [2022-11-20 11:26:52,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 36 [2022-11-20 11:26:52,936 INFO L321 Elim1Store]: treesize reduction 55, result has 25.7 percent of original size [2022-11-20 11:26:52,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 36 [2022-11-20 11:26:52,956 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_cursor_from_buf_~#cur~0.base_38| Int) (|v_aws_byte_cursor_from_buf_~#cur~0.offset_35| Int)) (let ((.cse0 (+ |v_aws_byte_cursor_from_buf_~#cur~0.offset_35| 8))) (and (= (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_from_buf_~#cur~0.base_38|) .cse0) |c_aws_byte_cursor_from_buf_#res.ptr.base|) (exists ((v_ArrVal_3513 Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |v_aws_byte_cursor_from_buf_~#cur~0.base_38| (store (store (select |c_old(#memory_$Pointer$.base)| |v_aws_byte_cursor_from_buf_~#cur~0.base_38|) .cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_aws_byte_cursor_from_buf_#in~buf.base|) (+ |c_aws_byte_cursor_from_buf_#in~buf.offset| 8))) |v_aws_byte_cursor_from_buf_~#cur~0.offset_35| v_ArrVal_3513))))))) is different from true [2022-11-20 11:26:53,026 INFO L321 Elim1Store]: treesize reduction 47, result has 24.2 percent of original size [2022-11-20 11:26:53,026 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 29 treesize of output 36 [2022-11-20 11:26:55,381 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_cursor_from_buf_~#cur~0.base_38| Int) (|ULTIMATE.start_aws_byte_cursor_from_buf_harness_~#buf~3#1.base| Int) (|v_ULTIMATE.start_aws_byte_cursor_from_buf_harness_~#cur~3#1.base_BEFORE_CALL_1| Int) (|v_aws_byte_cursor_from_buf_~#cur~0.offset_35| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_from_buf_~#cur~0.base_38|) (+ |v_aws_byte_cursor_from_buf_~#cur~0.offset_35| 8)))) (and (= .cse0 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_cursor_from_buf_harness_~#buf~3#1.base|) 8)) (not (= .cse0 0)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_from_buf_harness_~#cur~3#1.base_BEFORE_CALL_1|) 8))))) is different from true [2022-11-20 11:26:57,844 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_cursor_from_buf_~#cur~0.base_38| Int) (|ULTIMATE.start_aws_byte_cursor_from_buf_harness_~#buf~3#1.base| Int) (|v_ULTIMATE.start_aws_byte_cursor_from_buf_harness_~#cur~3#1.base_BEFORE_CALL_2| Int) (|v_aws_byte_cursor_from_buf_~#cur~0.offset_35| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_from_buf_~#cur~0.base_38|) (+ |v_aws_byte_cursor_from_buf_~#cur~0.offset_35| 8)))) (and (= .cse0 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_cursor_from_buf_harness_~#buf~3#1.base|) 8)) (not (= .cse0 0)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_from_buf_harness_~#cur~3#1.base_BEFORE_CALL_2|) 8))))) is different from true [2022-11-20 11:27:00,085 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_aws_byte_cursor_from_buf_~#cur~0.base_38| Int) (|ULTIMATE.start_aws_byte_cursor_from_buf_harness_~#buf~3#1.base| Int) (|v_ULTIMATE.start_aws_byte_cursor_from_buf_harness_~#cur~3#1.base_BEFORE_CALL_3| Int) (|v_aws_byte_cursor_from_buf_~#cur~0.offset_35| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_byte_cursor_from_buf_~#cur~0.base_38|) (+ |v_aws_byte_cursor_from_buf_~#cur~0.offset_35| 8)))) (and (= .cse0 (select (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_cursor_from_buf_harness_~#buf~3#1.base|) 8)) (not (= .cse0 0)) (= .cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_cursor_from_buf_harness_~#cur~3#1.base_BEFORE_CALL_3|) 8))))) is different from true [2022-11-20 11:27:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 40 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 17 not checked. [2022-11-20 11:27:05,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:07,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973745891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:27:07,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:27:07,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 34 [2022-11-20 11:27:07,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939019336] [2022-11-20 11:27:07,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:07,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:27:07,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:27:07,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:27:07,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1153, Unknown=7, NotChecked=360, Total=1640 [2022-11-20 11:27:07,837 INFO L87 Difference]: Start difference. First operand 237 states and 258 transitions. Second operand has 34 states, 33 states have (on average 4.090909090909091) internal successors, (135), 26 states have internal predecessors, (135), 11 states have call successors, (28), 9 states have call predecessors, (28), 10 states have return successors, (27), 13 states have call predecessors, (27), 10 states have call successors, (27) [2022-11-20 11:27:36,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:36,118 INFO L93 Difference]: Finished difference Result 352 states and 399 transitions. [2022-11-20 11:27:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 11:27:36,119 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 4.090909090909091) internal successors, (135), 26 states have internal predecessors, (135), 11 states have call successors, (28), 9 states have call predecessors, (28), 10 states have return successors, (27), 13 states have call predecessors, (27), 10 states have call successors, (27) Word has length 136 [2022-11-20 11:27:36,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:36,121 INFO L225 Difference]: With dead ends: 352 [2022-11-20 11:27:36,121 INFO L226 Difference]: Without dead ends: 294 [2022-11-20 11:27:36,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 179 SyntacticMatches, 8 SemanticMatches, 62 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=384, Invalid=3047, Unknown=11, NotChecked=590, Total=4032 [2022-11-20 11:27:36,123 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 226 mSDsluCounter, 1118 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 3722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2309 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:36,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 1243 Invalid, 3722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1332 Invalid, 0 Unknown, 2309 Unchecked, 1.9s Time] [2022-11-20 11:27:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-20 11:27:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 264. [2022-11-20 11:27:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 197 states have (on average 1.0609137055837563) internal successors, (209), 200 states have internal predecessors, (209), 38 states have call successors, (38), 26 states have call predecessors, (38), 28 states have return successors, (39), 37 states have call predecessors, (39), 37 states have call successors, (39) [2022-11-20 11:27:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 286 transitions. [2022-11-20 11:27:36,185 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 286 transitions. Word has length 136 [2022-11-20 11:27:36,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:36,186 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 286 transitions. [2022-11-20 11:27:36,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 4.090909090909091) internal successors, (135), 26 states have internal predecessors, (135), 11 states have call successors, (28), 9 states have call predecessors, (28), 10 states have return successors, (27), 13 states have call predecessors, (27), 10 states have call successors, (27) [2022-11-20 11:27:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 286 transitions. [2022-11-20 11:27:36,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-20 11:27:36,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:36,189 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:27:36,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-20 11:27:36,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 11:27:36,403 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:27:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:36,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1300774431, now seen corresponding path program 1 times [2022-11-20 11:27:36,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:27:36,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196504712] [2022-11-20 11:27:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:36,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:27:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:27:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:27:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:27:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:27:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:27:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:27:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:27:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:27:37,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:27:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:27:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:27:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:27:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-20 11:27:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-20 11:27:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-20 11:27:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-20 11:27:37,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:27:37,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196504712] [2022-11-20 11:27:37,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196504712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:27:37,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375759145] [2022-11-20 11:27:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:37,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:27:37,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:27:37,742 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:27:37,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 11:27:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:38,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 2764 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:27:38,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:27:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 11:27:39,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:27:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-20 11:27:40,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375759145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:27:40,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:27:40,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 11] total 35 [2022-11-20 11:27:40,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275941583] [2022-11-20 11:27:40,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:27:40,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 11:27:40,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:27:40,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 11:27:40,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:27:40,095 INFO L87 Difference]: Start difference. First operand 264 states and 286 transitions. Second operand has 35 states, 33 states have (on average 4.151515151515151) internal successors, (137), 28 states have internal predecessors, (137), 14 states have call successors, (39), 6 states have call predecessors, (39), 6 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-11-20 11:27:43,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:43,584 INFO L93 Difference]: Finished difference Result 276 states and 297 transitions. [2022-11-20 11:27:43,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:27:43,585 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 4.151515151515151) internal successors, (137), 28 states have internal predecessors, (137), 14 states have call successors, (39), 6 states have call predecessors, (39), 6 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) Word has length 139 [2022-11-20 11:27:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:43,589 INFO L225 Difference]: With dead ends: 276 [2022-11-20 11:27:43,589 INFO L226 Difference]: Without dead ends: 274 [2022-11-20 11:27:43,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=345, Invalid=2517, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 11:27:43,591 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 571 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 1804 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 2126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 1804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:43,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 584 Invalid, 2126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 1804 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 11:27:43,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-20 11:27:43,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 268. [2022-11-20 11:27:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 200 states have (on average 1.06) internal successors, (212), 203 states have internal predecessors, (212), 38 states have call successors, (38), 27 states have call predecessors, (38), 29 states have return successors, (39), 37 states have call predecessors, (39), 37 states have call successors, (39) [2022-11-20 11:27:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 289 transitions. [2022-11-20 11:27:43,659 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 289 transitions. Word has length 139 [2022-11-20 11:27:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:43,660 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 289 transitions. [2022-11-20 11:27:43,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 4.151515151515151) internal successors, (137), 28 states have internal predecessors, (137), 14 states have call successors, (39), 6 states have call predecessors, (39), 6 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-11-20 11:27:43,661 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 289 transitions. [2022-11-20 11:27:43,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-20 11:27:43,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:43,663 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:27:43,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 11:27:43,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 11:27:43,876 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:27:43,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:43,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1544444915, now seen corresponding path program 1 times [2022-11-20 11:27:43,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:27:43,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774326897] [2022-11-20 11:27:43,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:43,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:27:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:27:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:27:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:27:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:27:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:27:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:27:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:27:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:27:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:27:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:27:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:27:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:27:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-20 11:27:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-20 11:27:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-20 11:27:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-20 11:27:44,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:27:44,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774326897] [2022-11-20 11:27:44,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774326897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:27:44,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:27:44,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:27:44,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692120103] [2022-11-20 11:27:44,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:27:44,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:27:44,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:27:44,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:27:44,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:27:44,717 INFO L87 Difference]: Start difference. First operand 268 states and 289 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 11:27:45,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:45,471 INFO L93 Difference]: Finished difference Result 292 states and 314 transitions. [2022-11-20 11:27:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:27:45,472 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 140 [2022-11-20 11:27:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:45,473 INFO L225 Difference]: With dead ends: 292 [2022-11-20 11:27:45,473 INFO L226 Difference]: Without dead ends: 268 [2022-11-20 11:27:45,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:27:45,474 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 142 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:45,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 212 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:27:45,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-20 11:27:45,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2022-11-20 11:27:45,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 200 states have (on average 1.055) internal successors, (211), 203 states have internal predecessors, (211), 38 states have call successors, (38), 27 states have call predecessors, (38), 29 states have return successors, (39), 37 states have call predecessors, (39), 37 states have call successors, (39) [2022-11-20 11:27:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 288 transitions. [2022-11-20 11:27:45,535 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 288 transitions. Word has length 140 [2022-11-20 11:27:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:45,536 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 288 transitions. [2022-11-20 11:27:45,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-20 11:27:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 288 transitions. [2022-11-20 11:27:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-20 11:27:45,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:45,538 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:27:45,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-20 11:27:45,539 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:27:45,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:45,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1741911498, now seen corresponding path program 1 times [2022-11-20 11:27:45,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:27:45,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571837536] [2022-11-20 11:27:45,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:45,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:27:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:49,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:27:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:49,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:27:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:49,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:27:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:49,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:27:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:49,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:27:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:49,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:27:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:49,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:27:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:50,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:27:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:50,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:27:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:50,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:27:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:50,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:27:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:50,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:27:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:50,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-20 11:27:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:50,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-20 11:27:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:50,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-20 11:27:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:50,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-20 11:27:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-20 11:27:50,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:27:50,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571837536] [2022-11-20 11:27:50,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571837536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:27:50,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:27:50,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-20 11:27:50,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385351311] [2022-11-20 11:27:50,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:27:50,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:27:50,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:27:50,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:27:50,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:27:50,763 INFO L87 Difference]: Start difference. First operand 268 states and 288 transitions. Second operand has 16 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 8 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-20 11:27:53,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:27:53,175 INFO L93 Difference]: Finished difference Result 299 states and 329 transitions. [2022-11-20 11:27:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:27:53,175 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 8 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 145 [2022-11-20 11:27:53,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:27:53,178 INFO L225 Difference]: With dead ends: 299 [2022-11-20 11:27:53,178 INFO L226 Difference]: Without dead ends: 297 [2022-11-20 11:27:53,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:27:53,179 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 133 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:27:53,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 297 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 11:27:53,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-20 11:27:53,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 278. [2022-11-20 11:27:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 206 states have (on average 1.0533980582524272) internal successors, (217), 209 states have internal predecessors, (217), 41 states have call successors, (41), 28 states have call predecessors, (41), 30 states have return successors, (42), 40 states have call predecessors, (42), 40 states have call successors, (42) [2022-11-20 11:27:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 300 transitions. [2022-11-20 11:27:53,240 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 300 transitions. Word has length 145 [2022-11-20 11:27:53,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:27:53,241 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 300 transitions. [2022-11-20 11:27:53,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 8 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-20 11:27:53,241 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 300 transitions. [2022-11-20 11:27:53,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-20 11:27:53,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:27:53,243 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:27:53,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-20 11:27:53,243 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:27:53,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:27:53,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1973285387, now seen corresponding path program 1 times [2022-11-20 11:27:53,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:27:53,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480767285] [2022-11-20 11:27:53,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:27:53,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:27:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:58,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:27:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:58,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:27:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:58,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:27:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:58,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:27:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:58,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:27:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:58,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:27:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:58,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:27:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:59,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:27:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:59,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:27:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:59,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:27:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:59,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:27:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:59,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:27:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:59,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-20 11:27:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:59,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-20 11:27:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:59,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-20 11:27:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:59,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-20 11:27:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:59,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-20 11:27:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:27:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-20 11:27:59,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:27:59,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480767285] [2022-11-20 11:27:59,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480767285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:27:59,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:27:59,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-20 11:27:59,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319789787] [2022-11-20 11:27:59,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:27:59,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:27:59,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:27:59,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:27:59,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:27:59,669 INFO L87 Difference]: Start difference. First operand 278 states and 300 transitions. Second operand has 18 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 8 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-20 11:28:03,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:03,964 INFO L93 Difference]: Finished difference Result 303 states and 332 transitions. [2022-11-20 11:28:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:28:03,965 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 8 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 151 [2022-11-20 11:28:03,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:03,967 INFO L225 Difference]: With dead ends: 303 [2022-11-20 11:28:03,967 INFO L226 Difference]: Without dead ends: 301 [2022-11-20 11:28:03,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-11-20 11:28:03,968 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 203 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:03,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 337 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-20 11:28:03,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-20 11:28:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 284. [2022-11-20 11:28:04,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 210 states have (on average 1.0523809523809524) internal successors, (221), 213 states have internal predecessors, (221), 42 states have call successors, (42), 29 states have call predecessors, (42), 31 states have return successors, (43), 41 states have call predecessors, (43), 41 states have call successors, (43) [2022-11-20 11:28:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 306 transitions. [2022-11-20 11:28:04,046 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 306 transitions. Word has length 151 [2022-11-20 11:28:04,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:04,046 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 306 transitions. [2022-11-20 11:28:04,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 8 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-20 11:28:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 306 transitions. [2022-11-20 11:28:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-20 11:28:04,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:04,049 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:04,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-20 11:28:04,049 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:28:04,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:04,050 INFO L85 PathProgramCache]: Analyzing trace with hash -945245999, now seen corresponding path program 1 times [2022-11-20 11:28:04,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:28:04,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172030534] [2022-11-20 11:28:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:04,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:28:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:28:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:28:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:28:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:28:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:28:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:28:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:28:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:28:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:28:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:28:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:28:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:28:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:28:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-20 11:28:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-20 11:28:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 11:28:06,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:28:06,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172030534] [2022-11-20 11:28:06,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172030534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:06,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70001248] [2022-11-20 11:28:06,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:06,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:28:06,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:28:06,990 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:28:06,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 11:28:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:07,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 2819 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-20 11:28:07,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:08,389 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:28:08,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-20 11:28:08,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 11:28:08,508 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:28:08,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2022-11-20 11:28:08,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 11:28:10,756 INFO L321 Elim1Store]: treesize reduction 40, result has 18.4 percent of original size [2022-11-20 11:28:10,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 54 [2022-11-20 11:28:10,780 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2022-11-20 11:28:10,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 38 [2022-11-20 11:28:10,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-20 11:28:10,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-11-20 11:28:11,040 WARN L859 $PredicateComparison]: unable to prove that (exists ((|aws_byte_cursor_from_buf_~#cur~0.base| Int) (v_ArrVal_3957 (Array Int Int))) (and (= (store |c_old(#memory_int)| |aws_byte_cursor_from_buf_~#cur~0.base| (store v_ArrVal_3957 0 (select (select (store |c_old(#memory_int)| |aws_byte_cursor_from_buf_~#cur~0.base| v_ArrVal_3957) |c_aws_byte_cursor_from_buf_#in~buf.base|) |c_aws_byte_cursor_from_buf_#in~buf.offset|))) |c_#memory_int|) (let ((.cse0 (select (select |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base|) 0))) (<= .cse0 (+ 18446744073709551615 (* (div (+ (- 1) .cse0) 18446744073709551616) 18446744073709551616)))))) is different from true [2022-11-20 11:28:11,070 INFO L321 Elim1Store]: treesize reduction 40, result has 18.4 percent of original size [2022-11-20 11:28:11,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 54 [2022-11-20 11:28:11,097 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2022-11-20 11:28:11,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 38 [2022-11-20 11:28:11,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-20 11:28:11,150 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 20 [2022-11-20 11:28:11,182 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-11-20 11:28:11,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 15 [2022-11-20 11:28:11,418 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|aws_byte_cursor_from_buf_~#cur~0.base| Int) (v_ArrVal_3957 (Array Int Int))) (and (= (store |c_old(#memory_int)| |aws_byte_cursor_from_buf_~#cur~0.base| (store v_ArrVal_3957 0 (select (select (store |c_old(#memory_int)| |aws_byte_cursor_from_buf_~#cur~0.base| v_ArrVal_3957) |c_aws_byte_cursor_from_buf_#in~buf.base|) |c_aws_byte_cursor_from_buf_#in~buf.offset|))) |c_#memory_int|) (let ((.cse0 (select (select |c_#memory_int| |aws_byte_cursor_from_buf_~#cur~0.base|) 0))) (<= .cse0 (+ 18446744073709551615 (* (div (+ (- 1) .cse0) 18446744073709551616) 18446744073709551616)))))) (exists ((|v_ULTIMATE.start_aws_byte_cursor_from_buf_harness_~#buf~3#1.base_BEFORE_CALL_100| Int)) (not (= 0 (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_cursor_from_buf_harness_~#buf~3#1.base_BEFORE_CALL_100|) 0) 18446744073709551616))))) is different from true [2022-11-20 11:28:11,483 INFO L321 Elim1Store]: treesize reduction 40, result has 18.4 percent of original size [2022-11-20 11:28:11,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 54 [2022-11-20 11:28:11,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 31 [2022-11-20 11:28:11,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-20 11:28:11,548 INFO L350 Elim1Store]: Elim1 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 12 treesize of output 1 [2022-11-20 11:28:11,576 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 11:28:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 53 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:28:12,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:13,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70001248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:13,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:28:13,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 30 [2022-11-20 11:28:13,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316526664] [2022-11-20 11:28:13,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:13,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 11:28:13,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:28:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 11:28:13,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=951, Unknown=6, NotChecked=126, Total=1190 [2022-11-20 11:28:13,697 INFO L87 Difference]: Start difference. First operand 284 states and 306 transitions. Second operand has 30 states, 27 states have (on average 5.62962962962963) internal successors, (152), 26 states have internal predecessors, (152), 12 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2022-11-20 11:28:20,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:20,373 INFO L93 Difference]: Finished difference Result 384 states and 423 transitions. [2022-11-20 11:28:20,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:28:20,374 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 5.62962962962963) internal successors, (152), 26 states have internal predecessors, (152), 12 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) Word has length 149 [2022-11-20 11:28:20,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:20,376 INFO L225 Difference]: With dead ends: 384 [2022-11-20 11:28:20,376 INFO L226 Difference]: Without dead ends: 301 [2022-11-20 11:28:20,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 218 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=310, Invalid=2343, Unknown=7, NotChecked=202, Total=2862 [2022-11-20 11:28:20,378 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 190 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 3657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1493 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:20,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1122 Invalid, 3657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2110 Invalid, 0 Unknown, 1493 Unchecked, 3.0s Time] [2022-11-20 11:28:20,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-20 11:28:20,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 284. [2022-11-20 11:28:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 210 states have (on average 1.0476190476190477) internal successors, (220), 213 states have internal predecessors, (220), 42 states have call successors, (42), 29 states have call predecessors, (42), 31 states have return successors, (43), 41 states have call predecessors, (43), 41 states have call successors, (43) [2022-11-20 11:28:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 305 transitions. [2022-11-20 11:28:20,463 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 305 transitions. Word has length 149 [2022-11-20 11:28:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:20,463 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 305 transitions. [2022-11-20 11:28:20,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 5.62962962962963) internal successors, (152), 26 states have internal predecessors, (152), 12 states have call successors, (30), 6 states have call predecessors, (30), 9 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2022-11-20 11:28:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 305 transitions. [2022-11-20 11:28:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-20 11:28:20,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:20,466 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:20,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 11:28:20,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:28:20,679 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:28:20,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:20,680 INFO L85 PathProgramCache]: Analyzing trace with hash 440957395, now seen corresponding path program 1 times [2022-11-20 11:28:20,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:28:20,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5667798] [2022-11-20 11:28:20,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:20,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:28:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:24,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:28:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:24,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:28:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:24,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:28:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:24,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:28:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:24,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:28:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:24,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:28:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:24,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:28:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:24,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:28:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:25,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:28:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:25,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:28:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:25,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:28:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:25,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:28:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:25,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:28:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:25,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-20 11:28:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:25,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-20 11:28:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-20 11:28:25,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:28:25,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5667798] [2022-11-20 11:28:25,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5667798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:28:25,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:28:25,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-11-20 11:28:25,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103910883] [2022-11-20 11:28:25,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:28:25,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:28:25,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:28:25,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:28:25,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:28:25,655 INFO L87 Difference]: Start difference. First operand 284 states and 305 transitions. Second operand has 24 states, 21 states have (on average 3.380952380952381) internal successors, (71), 19 states have internal predecessors, (71), 12 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-20 11:28:28,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:28,585 INFO L93 Difference]: Finished difference Result 337 states and 366 transitions. [2022-11-20 11:28:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:28:28,586 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.380952380952381) internal successors, (71), 19 states have internal predecessors, (71), 12 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) Word has length 149 [2022-11-20 11:28:28,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:28,588 INFO L225 Difference]: With dead ends: 337 [2022-11-20 11:28:28,588 INFO L226 Difference]: Without dead ends: 284 [2022-11-20 11:28:28,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:28:28,590 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 116 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:28,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 396 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 11:28:28,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-20 11:28:28,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2022-11-20 11:28:28,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 210 states have (on average 1.042857142857143) internal successors, (219), 213 states have internal predecessors, (219), 42 states have call successors, (42), 29 states have call predecessors, (42), 31 states have return successors, (43), 41 states have call predecessors, (43), 41 states have call successors, (43) [2022-11-20 11:28:28,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 304 transitions. [2022-11-20 11:28:28,676 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 304 transitions. Word has length 149 [2022-11-20 11:28:28,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:28,676 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 304 transitions. [2022-11-20 11:28:28,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.380952380952381) internal successors, (71), 19 states have internal predecessors, (71), 12 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2022-11-20 11:28:28,677 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 304 transitions. [2022-11-20 11:28:28,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-20 11:28:28,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:28,679 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:28,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-20 11:28:28,679 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:28:28,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:28,680 INFO L85 PathProgramCache]: Analyzing trace with hash -765529606, now seen corresponding path program 1 times [2022-11-20 11:28:28,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:28:28,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161301147] [2022-11-20 11:28:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:28,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:28:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:28:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:28:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:28:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:28:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:28:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:28:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:28:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:28:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:28:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:28:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:28:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:28:29,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:28:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-20 11:28:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:29,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-20 11:28:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-20 11:28:30,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:28:30,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161301147] [2022-11-20 11:28:30,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161301147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:28:30,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:28:30,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-20 11:28:30,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261616900] [2022-11-20 11:28:30,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:28:30,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:28:30,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:28:30,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:28:30,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:28:30,258 INFO L87 Difference]: Start difference. First operand 284 states and 304 transitions. Second operand has 15 states, 14 states have (on average 5.0) internal successors, (70), 11 states have internal predecessors, (70), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-20 11:28:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:32,069 INFO L93 Difference]: Finished difference Result 290 states and 309 transitions. [2022-11-20 11:28:32,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:28:32,070 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.0) internal successors, (70), 11 states have internal predecessors, (70), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 151 [2022-11-20 11:28:32,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:32,071 INFO L225 Difference]: With dead ends: 290 [2022-11-20 11:28:32,071 INFO L226 Difference]: Without dead ends: 288 [2022-11-20 11:28:32,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:28:32,072 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 132 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:32,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 768 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 11:28:32,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-11-20 11:28:32,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2022-11-20 11:28:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 213 states have (on average 1.0422535211267605) internal successors, (222), 216 states have internal predecessors, (222), 42 states have call successors, (42), 30 states have call predecessors, (42), 32 states have return successors, (43), 41 states have call predecessors, (43), 41 states have call successors, (43) [2022-11-20 11:28:32,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 307 transitions. [2022-11-20 11:28:32,146 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 307 transitions. Word has length 151 [2022-11-20 11:28:32,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:32,147 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 307 transitions. [2022-11-20 11:28:32,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.0) internal successors, (70), 11 states have internal predecessors, (70), 2 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2022-11-20 11:28:32,147 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 307 transitions. [2022-11-20 11:28:32,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-20 11:28:32,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:32,149 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:28:32,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-20 11:28:32,149 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:28:32,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:32,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1664888606, now seen corresponding path program 1 times [2022-11-20 11:28:32,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:28:32,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327057540] [2022-11-20 11:28:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:32,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:28:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:36,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:28:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:36,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:28:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:36,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:28:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:36,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:28:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:36,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:28:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:36,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:28:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:36,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:28:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:38,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:28:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:38,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:28:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:38,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:28:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:38,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:28:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:38,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:28:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:38,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-20 11:28:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:38,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-20 11:28:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:38,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-20 11:28:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:38,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-20 11:28:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:38,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-20 11:28:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:38,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-20 11:28:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-20 11:28:38,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:28:38,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327057540] [2022-11-20 11:28:38,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327057540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:28:38,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:28:38,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-20 11:28:38,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506126969] [2022-11-20 11:28:38,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:28:38,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:28:38,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:28:38,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:28:38,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:28:38,324 INFO L87 Difference]: Start difference. First operand 288 states and 307 transitions. Second operand has 17 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 8 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-20 11:28:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:41,366 INFO L93 Difference]: Finished difference Result 311 states and 336 transitions. [2022-11-20 11:28:41,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:28:41,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 8 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 157 [2022-11-20 11:28:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:41,367 INFO L225 Difference]: With dead ends: 311 [2022-11-20 11:28:41,367 INFO L226 Difference]: Without dead ends: 309 [2022-11-20 11:28:41,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:28:41,368 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 197 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:41,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 294 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 11:28:41,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-11-20 11:28:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 294. [2022-11-20 11:28:41,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 217 states have (on average 1.0414746543778801) internal successors, (226), 220 states have internal predecessors, (226), 43 states have call successors, (43), 31 states have call predecessors, (43), 33 states have return successors, (44), 42 states have call predecessors, (44), 42 states have call successors, (44) [2022-11-20 11:28:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 313 transitions. [2022-11-20 11:28:41,425 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 313 transitions. Word has length 157 [2022-11-20 11:28:41,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:41,426 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 313 transitions. [2022-11-20 11:28:41,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 8 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-20 11:28:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 313 transitions. [2022-11-20 11:28:41,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-20 11:28:41,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:41,428 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:41,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-11-20 11:28:41,428 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:28:41,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:41,429 INFO L85 PathProgramCache]: Analyzing trace with hash 712616961, now seen corresponding path program 1 times [2022-11-20 11:28:41,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:28:41,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859979932] [2022-11-20 11:28:41,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:41,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:28:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:42,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:28:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:42,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:28:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:42,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:28:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:42,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:28:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:42,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:28:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:42,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:28:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:42,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:28:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:42,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:28:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:43,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:28:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:43,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:28:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:43,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:28:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:43,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:28:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:43,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:28:43,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:43,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-20 11:28:43,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:43,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-20 11:28:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:43,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-20 11:28:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:43,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-11-20 11:28:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-20 11:28:43,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:28:43,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859979932] [2022-11-20 11:28:43,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859979932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:43,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246952983] [2022-11-20 11:28:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:43,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:28:43,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:28:43,494 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:28:43,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 11:28:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:45,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 2859 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 11:28:45,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:28:45,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:28:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-20 11:28:46,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:28:47,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 66 [2022-11-20 11:28:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-20 11:28:47,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246952983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:28:47,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:28:47,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 12] total 30 [2022-11-20 11:28:47,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662619104] [2022-11-20 11:28:47,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:28:47,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 11:28:47,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:28:47,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 11:28:47,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:28:47,795 INFO L87 Difference]: Start difference. First operand 294 states and 313 transitions. Second operand has 30 states, 28 states have (on average 4.357142857142857) internal successors, (122), 23 states have internal predecessors, (122), 8 states have call successors, (28), 5 states have call predecessors, (28), 9 states have return successors, (26), 9 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-20 11:28:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:49,797 INFO L93 Difference]: Finished difference Result 349 states and 373 transitions. [2022-11-20 11:28:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 11:28:49,798 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 4.357142857142857) internal successors, (122), 23 states have internal predecessors, (122), 8 states have call successors, (28), 5 states have call predecessors, (28), 9 states have return successors, (26), 9 states have call predecessors, (26), 8 states have call successors, (26) Word has length 158 [2022-11-20 11:28:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:49,799 INFO L225 Difference]: With dead ends: 349 [2022-11-20 11:28:49,799 INFO L226 Difference]: Without dead ends: 293 [2022-11-20 11:28:49,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 321 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 11:28:49,800 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 147 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 578 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:49,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 780 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 676 Invalid, 0 Unknown, 578 Unchecked, 1.0s Time] [2022-11-20 11:28:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-20 11:28:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2022-11-20 11:28:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 217 states have (on average 1.0368663594470047) internal successors, (225), 220 states have internal predecessors, (225), 42 states have call successors, (42), 31 states have call predecessors, (42), 33 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-11-20 11:28:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 309 transitions. [2022-11-20 11:28:49,861 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 309 transitions. Word has length 158 [2022-11-20 11:28:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:49,862 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 309 transitions. [2022-11-20 11:28:49,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 4.357142857142857) internal successors, (122), 23 states have internal predecessors, (122), 8 states have call successors, (28), 5 states have call predecessors, (28), 9 states have return successors, (26), 9 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-20 11:28:49,862 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 309 transitions. [2022-11-20 11:28:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-20 11:28:49,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:49,864 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:49,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 11:28:50,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-20 11:28:50,079 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:28:50,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:50,080 INFO L85 PathProgramCache]: Analyzing trace with hash -293705745, now seen corresponding path program 1 times [2022-11-20 11:28:50,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:28:50,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684261798] [2022-11-20 11:28:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:50,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:28:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:28:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:28:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:28:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:28:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:28:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:28:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:28:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:28:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:28:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:28:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:28:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:28:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-20 11:28:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-20 11:28:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-20 11:28:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-20 11:28:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-20 11:28:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-20 11:28:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-20 11:28:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-20 11:28:53,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:28:53,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684261798] [2022-11-20 11:28:53,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684261798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:28:53,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:28:53,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-11-20 11:28:53,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304469430] [2022-11-20 11:28:53,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:28:53,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:28:53,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:28:53,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:28:53,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:28:53,883 INFO L87 Difference]: Start difference. First operand 293 states and 309 transitions. Second operand has 18 states, 16 states have (on average 3.8125) internal successors, (61), 14 states have internal predecessors, (61), 8 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-11-20 11:28:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:28:55,919 INFO L93 Difference]: Finished difference Result 299 states and 314 transitions. [2022-11-20 11:28:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:28:55,920 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.8125) internal successors, (61), 14 states have internal predecessors, (61), 8 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 165 [2022-11-20 11:28:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:28:55,921 INFO L225 Difference]: With dead ends: 299 [2022-11-20 11:28:55,921 INFO L226 Difference]: Without dead ends: 297 [2022-11-20 11:28:55,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:28:55,922 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 195 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:28:55,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 374 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 11:28:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-20 11:28:55,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2022-11-20 11:28:55,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 220 states have (on average 1.0363636363636364) internal successors, (228), 223 states have internal predecessors, (228), 42 states have call successors, (42), 32 states have call predecessors, (42), 34 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-11-20 11:28:55,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 312 transitions. [2022-11-20 11:28:55,989 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 312 transitions. Word has length 165 [2022-11-20 11:28:55,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:28:55,989 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 312 transitions. [2022-11-20 11:28:55,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.8125) internal successors, (61), 14 states have internal predecessors, (61), 8 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-11-20 11:28:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 312 transitions. [2022-11-20 11:28:55,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-11-20 11:28:55,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:28:55,991 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:28:55,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-20 11:28:55,992 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:28:55,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:28:55,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1982210701, now seen corresponding path program 1 times [2022-11-20 11:28:55,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:28:55,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27367227] [2022-11-20 11:28:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:55,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:28:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:28:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:28:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:28:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:28:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:28:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:28:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:28:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:28:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:28:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:28:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:28:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:28:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-20 11:28:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-20 11:28:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-20 11:28:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-20 11:28:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-20 11:28:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-20 11:28:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-20 11:28:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:28:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-11-20 11:28:59,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:28:59,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27367227] [2022-11-20 11:28:59,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27367227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:28:59,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290589731] [2022-11-20 11:28:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:28:59,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:28:59,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:28:59,893 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:28:59,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 11:29:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:00,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 2849 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 11:29:00,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:00,862 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-20 11:29:00,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 11:29:03,976 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:29:03,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2022-11-20 11:29:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 49 proven. 6 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-20 11:29:03,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:04,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-20 11:29:04,878 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 11:29:04,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 45 [2022-11-20 11:29:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-11-20 11:29:04,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290589731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:29:04,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:29:04,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 11] total 32 [2022-11-20 11:29:04,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644122495] [2022-11-20 11:29:04,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:04,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 11:29:04,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:29:04,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 11:29:04,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2022-11-20 11:29:04,926 INFO L87 Difference]: Start difference. First operand 297 states and 312 transitions. Second operand has 32 states, 28 states have (on average 5.0) internal successors, (140), 29 states have internal predecessors, (140), 20 states have call successors, (53), 5 states have call predecessors, (53), 7 states have return successors, (51), 14 states have call predecessors, (51), 19 states have call successors, (51) [2022-11-20 11:29:08,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:08,238 INFO L93 Difference]: Finished difference Result 438 states and 462 transitions. [2022-11-20 11:29:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 11:29:08,238 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 5.0) internal successors, (140), 29 states have internal predecessors, (140), 20 states have call successors, (53), 5 states have call predecessors, (53), 7 states have return successors, (51), 14 states have call predecessors, (51), 19 states have call successors, (51) Word has length 167 [2022-11-20 11:29:08,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:08,240 INFO L225 Difference]: With dead ends: 438 [2022-11-20 11:29:08,240 INFO L226 Difference]: Without dead ends: 390 [2022-11-20 11:29:08,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 342 SyntacticMatches, 21 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=228, Invalid=2120, Unknown=4, NotChecked=0, Total=2352 [2022-11-20 11:29:08,241 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 137 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:08,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1151 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1621 Invalid, 0 Unknown, 345 Unchecked, 2.1s Time] [2022-11-20 11:29:08,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-20 11:29:08,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 362. [2022-11-20 11:29:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 269 states have (on average 1.029739776951673) internal successors, (277), 273 states have internal predecessors, (277), 51 states have call successors, (51), 38 states have call predecessors, (51), 41 states have return successors, (52), 50 states have call predecessors, (52), 50 states have call successors, (52) [2022-11-20 11:29:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 380 transitions. [2022-11-20 11:29:08,318 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 380 transitions. Word has length 167 [2022-11-20 11:29:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:08,319 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 380 transitions. [2022-11-20 11:29:08,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 5.0) internal successors, (140), 29 states have internal predecessors, (140), 20 states have call successors, (53), 5 states have call predecessors, (53), 7 states have return successors, (51), 14 states have call predecessors, (51), 19 states have call successors, (51) [2022-11-20 11:29:08,320 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 380 transitions. [2022-11-20 11:29:08,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-20 11:29:08,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:08,322 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:29:08,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:08,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-20 11:29:08,541 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:29:08,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:08,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1455102542, now seen corresponding path program 1 times [2022-11-20 11:29:08,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:29:08,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557839354] [2022-11-20 11:29:08,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:29:08,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:29:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:12,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:29:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:12,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:29:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:12,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:29:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:12,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:29:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:12,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:29:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:12,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:29:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:12,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:29:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:12,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:29:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:13,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:29:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:13,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:29:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:13,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:29:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:13,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:29:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:13,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:29:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:13,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-20 11:29:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:13,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-20 11:29:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:13,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-20 11:29:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:13,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-11-20 11:29:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-20 11:29:13,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:29:13,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557839354] [2022-11-20 11:29:13,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557839354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:29:13,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:29:13,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-20 11:29:13,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817423552] [2022-11-20 11:29:13,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:29:13,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:29:13,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:29:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:29:13,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:29:13,396 INFO L87 Difference]: Start difference. First operand 362 states and 380 transitions. Second operand has 20 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 11 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 10 states have call successors, (17) [2022-11-20 11:29:15,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:15,809 INFO L93 Difference]: Finished difference Result 368 states and 385 transitions. [2022-11-20 11:29:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:29:15,810 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 11 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 10 states have call successors, (17) Word has length 164 [2022-11-20 11:29:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:15,812 INFO L225 Difference]: With dead ends: 368 [2022-11-20 11:29:15,812 INFO L226 Difference]: Without dead ends: 366 [2022-11-20 11:29:15,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:29:15,813 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 152 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:15,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 258 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 11:29:15,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-11-20 11:29:15,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 366. [2022-11-20 11:29:15,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 272 states have (on average 1.0294117647058822) internal successors, (280), 276 states have internal predecessors, (280), 51 states have call successors, (51), 39 states have call predecessors, (51), 42 states have return successors, (52), 50 states have call predecessors, (52), 50 states have call successors, (52) [2022-11-20 11:29:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 383 transitions. [2022-11-20 11:29:15,893 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 383 transitions. Word has length 164 [2022-11-20 11:29:15,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:15,893 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 383 transitions. [2022-11-20 11:29:15,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 11 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (17), 8 states have call predecessors, (17), 10 states have call successors, (17) [2022-11-20 11:29:15,894 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 383 transitions. [2022-11-20 11:29:15,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-20 11:29:15,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:15,895 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:29:15,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-20 11:29:15,896 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:29:15,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:15,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1929948540, now seen corresponding path program 1 times [2022-11-20 11:29:15,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:29:15,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884400194] [2022-11-20 11:29:15,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:29:15,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:29:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:29:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:29:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:29:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:29:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:29:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:29:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:29:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:29:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:29:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:29:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 11:29:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-20 11:29:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-20 11:29:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-11-20 11:29:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-20 11:29:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-11-20 11:29:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-20 11:29:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-20 11:29:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2022-11-20 11:29:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-11-20 11:29:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-11-20 11:29:19,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:29:19,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884400194] [2022-11-20 11:29:19,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884400194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:29:19,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:29:19,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-11-20 11:29:19,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600458309] [2022-11-20 11:29:19,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:29:19,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:29:19,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:29:19,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:29:19,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:29:19,899 INFO L87 Difference]: Start difference. First operand 366 states and 383 transitions. Second operand has 19 states, 18 states have (on average 3.5) internal successors, (63), 14 states have internal predecessors, (63), 9 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2022-11-20 11:29:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:22,354 INFO L93 Difference]: Finished difference Result 383 states and 403 transitions. [2022-11-20 11:29:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:29:22,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 14 states have internal predecessors, (63), 9 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) Word has length 172 [2022-11-20 11:29:22,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:22,356 INFO L225 Difference]: With dead ends: 383 [2022-11-20 11:29:22,356 INFO L226 Difference]: Without dead ends: 381 [2022-11-20 11:29:22,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:29:22,357 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 137 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:22,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 367 Invalid, 1628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 11:29:22,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-20 11:29:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 375. [2022-11-20 11:29:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 278 states have (on average 1.0287769784172662) internal successors, (286), 283 states have internal predecessors, (286), 53 states have call successors, (53), 40 states have call predecessors, (53), 43 states have return successors, (54), 51 states have call predecessors, (54), 52 states have call successors, (54) [2022-11-20 11:29:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 393 transitions. [2022-11-20 11:29:22,459 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 393 transitions. Word has length 172 [2022-11-20 11:29:22,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:22,459 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 393 transitions. [2022-11-20 11:29:22,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 14 states have internal predecessors, (63), 9 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2022-11-20 11:29:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 393 transitions. [2022-11-20 11:29:22,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-20 11:29:22,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:22,462 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:29:22,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-11-20 11:29:22,462 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:29:22,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:22,463 INFO L85 PathProgramCache]: Analyzing trace with hash -884293497, now seen corresponding path program 1 times [2022-11-20 11:29:22,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:29:22,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008484912] [2022-11-20 11:29:22,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:29:22,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:29:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:32,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:29:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:32,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:29:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:32,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:29:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:32,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:29:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:32,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:29:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:32,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:29:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:32,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:29:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:32,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:29:32,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:33,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:29:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:33,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:29:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:33,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:29:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:33,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:29:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:33,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:29:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:33,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-20 11:29:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:33,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-20 11:29:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:33,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-20 11:29:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:33,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-11-20 11:29:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:33,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-11-20 11:29:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-20 11:29:34,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:29:34,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008484912] [2022-11-20 11:29:34,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008484912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:29:34,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019138959] [2022-11-20 11:29:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:29:34,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:29:34,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:29:34,119 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:29:34,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 11:29:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:36,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 2894 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-20 11:29:36,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:29:36,143 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:29:36,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 11:29:37,201 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:29:37,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-20 11:29:37,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:29:37,915 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-20 11:29:37,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 30 [2022-11-20 11:29:38,104 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:29:38,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2022-11-20 11:29:38,503 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:29:38,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2022-11-20 11:29:38,668 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-20 11:29:38,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 22 treesize of output 33 [2022-11-20 11:29:38,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:29:38,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:29:38,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:29:38,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:29:38,946 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:29:38,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2022-11-20 11:29:38,976 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-20 11:29:38,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 18 [2022-11-20 11:29:39,603 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:29:39,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-20 11:29:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 23 proven. 70 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 11:29:39,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:29:41,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019138959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:29:41,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:29:41,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 42 [2022-11-20 11:29:41,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073106915] [2022-11-20 11:29:41,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:29:41,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 11:29:41,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:29:41,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 11:29:41,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2280, Unknown=5, NotChecked=0, Total=2450 [2022-11-20 11:29:41,411 INFO L87 Difference]: Start difference. First operand 375 states and 393 transitions. Second operand has 42 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 39 states have internal predecessors, (130), 21 states have call successors, (37), 9 states have call predecessors, (37), 11 states have return successors, (36), 16 states have call predecessors, (36), 20 states have call successors, (36) [2022-11-20 11:29:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:29:48,476 INFO L93 Difference]: Finished difference Result 385 states and 401 transitions. [2022-11-20 11:29:48,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 11:29:48,477 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 39 states have internal predecessors, (130), 21 states have call successors, (37), 9 states have call predecessors, (37), 11 states have return successors, (36), 16 states have call predecessors, (36), 20 states have call successors, (36) Word has length 170 [2022-11-20 11:29:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:29:48,478 INFO L225 Difference]: With dead ends: 385 [2022-11-20 11:29:48,479 INFO L226 Difference]: Without dead ends: 383 [2022-11-20 11:29:48,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 237 SyntacticMatches, 18 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=465, Invalid=6161, Unknown=16, NotChecked=0, Total=6642 [2022-11-20 11:29:48,480 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 331 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 2979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:29:48,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 780 Invalid, 2979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 2250 Invalid, 0 Unknown, 497 Unchecked, 3.2s Time] [2022-11-20 11:29:48,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-11-20 11:29:48,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2022-11-20 11:29:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 284 states have (on average 1.028169014084507) internal successors, (292), 289 states have internal predecessors, (292), 53 states have call successors, (53), 42 states have call predecessors, (53), 45 states have return successors, (54), 51 states have call predecessors, (54), 52 states have call successors, (54) [2022-11-20 11:29:48,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 399 transitions. [2022-11-20 11:29:48,579 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 399 transitions. Word has length 170 [2022-11-20 11:29:48,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:29:48,579 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 399 transitions. [2022-11-20 11:29:48,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 39 states have internal predecessors, (130), 21 states have call successors, (37), 9 states have call predecessors, (37), 11 states have return successors, (36), 16 states have call predecessors, (36), 20 states have call successors, (36) [2022-11-20 11:29:48,579 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 399 transitions. [2022-11-20 11:29:48,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-20 11:29:48,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:29:48,581 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:29:48,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 11:29:48,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-20 11:29:48,782 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:29:48,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:29:48,782 INFO L85 PathProgramCache]: Analyzing trace with hash 711628756, now seen corresponding path program 1 times [2022-11-20 11:29:48,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:29:48,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797918700] [2022-11-20 11:29:48,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:29:48,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:29:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:56,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:29:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:56,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:29:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:56,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-20 11:29:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:56,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-20 11:29:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:56,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:29:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:56,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-20 11:29:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:56,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-20 11:29:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:56,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-20 11:29:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:56,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-20 11:29:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:57,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:29:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:57,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:29:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:57,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:29:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:57,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:29:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:57,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-20 11:29:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:57,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-11-20 11:29:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:57,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-11-20 11:29:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:57,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-11-20 11:29:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:57,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-11-20 11:29:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:57,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-11-20 11:29:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:57,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-11-20 11:29:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:29:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-20 11:29:57,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:29:57,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797918700] [2022-11-20 11:29:57,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797918700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:29:57,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:29:57,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-11-20 11:29:57,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832960307] [2022-11-20 11:29:57,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:29:57,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 11:29:57,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:29:57,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 11:29:57,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-11-20 11:29:57,637 INFO L87 Difference]: Start difference. First operand 383 states and 399 transitions. Second operand has 23 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 19 states have internal predecessors, (69), 13 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2022-11-20 11:30:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:30:00,984 INFO L93 Difference]: Finished difference Result 385 states and 400 transitions. [2022-11-20 11:30:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:30:00,985 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 19 states have internal predecessors, (69), 13 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) Word has length 181 [2022-11-20 11:30:00,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:30:00,987 INFO L225 Difference]: With dead ends: 385 [2022-11-20 11:30:00,987 INFO L226 Difference]: Without dead ends: 383 [2022-11-20 11:30:00,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:30:00,988 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 194 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:30:00,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 324 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1829 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-20 11:30:00,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-11-20 11:30:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2022-11-20 11:30:01,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 284 states have (on average 1.0246478873239437) internal successors, (291), 289 states have internal predecessors, (291), 53 states have call successors, (53), 42 states have call predecessors, (53), 45 states have return successors, (54), 51 states have call predecessors, (54), 52 states have call successors, (54) [2022-11-20 11:30:01,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 398 transitions. [2022-11-20 11:30:01,124 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 398 transitions. Word has length 181 [2022-11-20 11:30:01,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:30:01,125 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 398 transitions. [2022-11-20 11:30:01,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 19 states have internal predecessors, (69), 13 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 10 states have call predecessors, (20), 12 states have call successors, (20) [2022-11-20 11:30:01,125 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 398 transitions. [2022-11-20 11:30:01,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-20 11:30:01,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:30:01,128 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:30:01,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-11-20 11:30:01,128 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:30:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:30:01,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1229031159, now seen corresponding path program 1 times [2022-11-20 11:30:01,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:30:01,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328151979] [2022-11-20 11:30:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:30:01,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:30:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:35,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:30:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:35,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 11:30:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:36,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:30:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:36,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:30:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:36,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 11:30:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:36,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 11:30:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:36,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-11-20 11:30:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:36,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-20 11:30:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:38,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-20 11:30:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:39,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-20 11:30:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:39,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 11:30:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:40,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-20 11:30:40,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:40,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 11:30:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:40,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-11-20 11:30:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:40,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-11-20 11:30:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:40,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-20 11:30:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:40,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-11-20 11:30:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:40,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-11-20 11:30:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:40,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-11-20 11:30:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:40,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-11-20 11:30:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 42 proven. 22 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-11-20 11:30:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:30:40,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328151979] [2022-11-20 11:30:40,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328151979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:30:40,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87185464] [2022-11-20 11:30:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:30:40,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:30:40,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:30:40,177 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:30:40,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00432464-af5b-4882-ac50-6c76d8c95ca2/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 11:30:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:30:41,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 2953 conjuncts, 225 conjunts are in the unsatisfiable core [2022-11-20 11:30:41,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:30:41,930 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 11:30:43,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 11:30:44,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:30:44,175 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-20 11:30:44,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:30:44,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:30:44,437 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 24