./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 03b17f77ffc9b60dd6edfa1d1cf71f248568a9cd6bbbccab8c3e61d5773c4168 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:05:26,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:05:26,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:05:26,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:05:26,563 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:05:26,565 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:05:26,577 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:05:26,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:05:26,581 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:05:26,582 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:05:26,583 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:05:26,584 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:05:26,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:05:26,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:05:26,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:05:26,589 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:05:26,590 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:05:26,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:05:26,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:05:26,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:05:26,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:05:26,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:05:26,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:05:26,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:05:26,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:05:26,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:05:26,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:05:26,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:05:26,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:05:26,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:05:26,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:05:26,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:05:26,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:05:26,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:05:26,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:05:26,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:05:26,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:05:26,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:05:26,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:05:26,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:05:26,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:05:26,656 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-25 17:05:26,684 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:05:26,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:05:26,685 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:05:26,685 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:05:26,686 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:05:26,686 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:05:26,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:05:26,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:05:26,688 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:05:26,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:05:26,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:05:26,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:05:26,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:05:26,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:05:26,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:05:26,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:05:26,690 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:05:26,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:05:26,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:05:26,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:05:26,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:05:26,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:05:26,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:05:26,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:05:26,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:05:26,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:05:26,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:05:26,692 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:05:26,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:05:26,693 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:05:26,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:05:26,693 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03b17f77ffc9b60dd6edfa1d1cf71f248568a9cd6bbbccab8c3e61d5773c4168 [2022-11-25 17:05:26,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:05:27,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:05:27,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:05:27,046 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:05:27,047 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:05:27,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i [2022-11-25 17:05:30,582 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:05:31,416 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:05:31,417 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i [2022-11-25 17:05:31,471 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/data/83e2bc3e1/45fd1752a4e546b287bc3c02206c441d/FLAGe5e4e1f8f [2022-11-25 17:05:31,490 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/data/83e2bc3e1/45fd1752a4e546b287bc3c02206c441d [2022-11-25 17:05:31,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:05:31,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:05:31,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:05:31,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:05:31,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:05:31,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:05:31" (1/1) ... [2022-11-25 17:05:31,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@703a79bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:05:31, skipping insertion in model container [2022-11-25 17:05:31,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:05:31" (1/1) ... [2022-11-25 17:05:31,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:05:31,651 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:05:32,001 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_3c0df254-2ad1-4cb0-844c-23062b8147f9/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4492,4505] [2022-11-25 17:05:32,013 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_3c0df254-2ad1-4cb0-844c-23062b8147f9/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4552,4565] [2022-11-25 17:05:33,442 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:33,443 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:33,443 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:33,444 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:33,446 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:33,461 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:33,462 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:33,464 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:33,465 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:33,467 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:33,468 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:33,469 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:33,470 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:33,616 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 17:05:33,617 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 17:05:33,622 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 17:05:33,627 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 17:05:33,639 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 17:05:33,642 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 17:05:34,245 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 17:05:34,246 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 17:05:34,248 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 17:05:34,249 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 17:05:34,267 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 17:05:34,269 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 17:05:34,270 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 17:05:34,271 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 17:05:34,271 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 17:05:34,272 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 17:05:34,273 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 17:05:34,545 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 17:05:34,616 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:05:34,930 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:34,931 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:34,968 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:34,970 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:34,977 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:34,978 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:34,998 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,000 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,000 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,001 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,001 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,002 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,003 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:05:35,125 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:05:35,156 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_3c0df254-2ad1-4cb0-844c-23062b8147f9/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4492,4505] [2022-11-25 17:05:35,157 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_3c0df254-2ad1-4cb0-844c-23062b8147f9/sv-benchmarks/c/aws-c-common/aws_hash_iter_done_harness.i[4552,4565] [2022-11-25 17:05:35,204 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,204 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,205 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,205 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,206 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,220 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,222 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,224 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,224 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,225 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,226 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,227 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,227 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,236 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 17:05:35,237 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 17:05:35,237 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 17:05:35,240 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 17:05:35,241 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 17:05:35,242 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 17:05:35,263 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 17:05:35,264 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 17:05:35,266 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 17:05:35,267 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 17:05:35,269 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 17:05:35,270 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 17:05:35,271 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 17:05:35,272 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 17:05:35,273 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 17:05:35,274 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 17:05:35,274 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 17:05:35,311 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 17:05:35,349 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 17:05:35,419 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,420 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,427 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,428 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,431 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,431 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,446 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,447 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,448 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,449 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,449 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,451 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,451 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 17:05:35,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:05:35,900 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:05:35,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:05:35 WrapperNode [2022-11-25 17:05:35,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:05:35,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:05:35,905 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:05:35,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:05:35,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:05:35" (1/1) ... [2022-11-25 17:05:36,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:05:35" (1/1) ... [2022-11-25 17:05:36,132 INFO L138 Inliner]: procedures = 774, calls = 2453, calls flagged for inlining = 67, calls inlined = 11, statements flattened = 641 [2022-11-25 17:05:36,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:05:36,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:05:36,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:05:36,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:05:36,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:05:35" (1/1) ... [2022-11-25 17:05:36,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:05:35" (1/1) ... [2022-11-25 17:05:36,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:05:35" (1/1) ... [2022-11-25 17:05:36,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:05:35" (1/1) ... [2022-11-25 17:05:36,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:05:35" (1/1) ... [2022-11-25 17:05:36,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:05:35" (1/1) ... [2022-11-25 17:05:36,240 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:05:35" (1/1) ... [2022-11-25 17:05:36,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:05:35" (1/1) ... [2022-11-25 17:05:36,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:05:36,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:05:36,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:05:36,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:05:36,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:05:35" (1/1) ... [2022-11-25 17:05:36,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:05:36,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:05:36,288 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:05:36,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:05:36,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-11-25 17:05:36,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:05:36,340 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_done [2022-11-25 17:05:36,340 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_done [2022-11-25 17:05:36,341 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-25 17:05:36,341 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-25 17:05:36,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 17:05:36,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 17:05:36,341 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2022-11-25 17:05:36,341 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2022-11-25 17:05:36,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:05:36,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:05:36,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 17:05:36,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:05:36,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:05:36,342 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-25 17:05:36,343 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-25 17:05:36,343 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-11-25 17:05:36,343 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-11-25 17:05:36,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:05:36,343 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2022-11-25 17:05:36,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2022-11-25 17:05:36,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 17:05:36,344 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-25 17:05:36,344 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-25 17:05:36,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:05:36,344 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2022-11-25 17:05:36,345 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2022-11-25 17:05:36,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:05:36,345 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2022-11-25 17:05:36,345 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2022-11-25 17:05:36,345 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 17:05:36,345 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 17:05:36,346 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2022-11-25 17:05:36,346 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2022-11-25 17:05:36,346 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2022-11-25 17:05:36,346 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2022-11-25 17:05:36,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 17:05:36,346 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-11-25 17:05:36,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-11-25 17:05:36,347 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2022-11-25 17:05:36,347 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2022-11-25 17:05:36,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:05:36,732 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:05:36,735 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:05:37,927 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:05:37,942 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:05:37,942 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 17:05:37,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:05:37 BoogieIcfgContainer [2022-11-25 17:05:37,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:05:37,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:05:37,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:05:37,956 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:05:37,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:05:31" (1/3) ... [2022-11-25 17:05:37,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0c5318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:05:37, skipping insertion in model container [2022-11-25 17:05:37,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:05:35" (2/3) ... [2022-11-25 17:05:37,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0c5318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:05:37, skipping insertion in model container [2022-11-25 17:05:37,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:05:37" (3/3) ... [2022-11-25 17:05:37,966 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_iter_done_harness.i [2022-11-25 17:05:37,994 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:05:37,994 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:05:38,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:05:38,096 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;@3e41b03f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:05:38,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:05:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 100 states have (on average 1.23) internal successors, (123), 101 states have internal predecessors, (123), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-25 17:05:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-25 17:05:38,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:05:38,126 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:05:38,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:05:38,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:05:38,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1143533925, now seen corresponding path program 1 times [2022-11-25 17:05:38,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:05:38,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303992246] [2022-11-25 17:05:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:38,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:05:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:38,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:05:38,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303992246] [2022-11-25 17:05:38,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 17:05:38,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507681303] [2022-11-25 17:05:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:38,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:38,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:05:38,773 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:05:38,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:05:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:39,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 17:05:39,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:05:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-25 17:05:39,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:05:39,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507681303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:05:39,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:05:39,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:05:39,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583307870] [2022-11-25 17:05:39,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:05:39,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:05:39,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:05:39,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:05:39,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:05:39,759 INFO L87 Difference]: Start difference. First operand has 157 states, 100 states have (on average 1.23) internal successors, (123), 101 states have internal predecessors, (123), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-25 17:05:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:05:39,837 INFO L93 Difference]: Finished difference Result 306 states and 418 transitions. [2022-11-25 17:05:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:05:39,840 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 140 [2022-11-25 17:05:39,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:05:39,857 INFO L225 Difference]: With dead ends: 306 [2022-11-25 17:05:39,857 INFO L226 Difference]: Without dead ends: 151 [2022-11-25 17:05:39,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:05:39,875 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:05:39,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:05:39,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-25 17:05:39,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-11-25 17:05:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.2210526315789474) internal successors, (116), 96 states have internal predecessors, (116), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-25 17:05:39,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 195 transitions. [2022-11-25 17:05:39,959 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 195 transitions. Word has length 140 [2022-11-25 17:05:39,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:05:39,960 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 195 transitions. [2022-11-25 17:05:39,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.0) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-11-25 17:05:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 195 transitions. [2022-11-25 17:05:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-25 17:05:39,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:05:39,970 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:05:39,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:05:40,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 17:05:40,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:05:40,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:05:40,192 INFO L85 PathProgramCache]: Analyzing trace with hash 611203689, now seen corresponding path program 1 times [2022-11-25 17:05:40,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:05:40,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848369118] [2022-11-25 17:05:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:40,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:05:40,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:05:40,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650085021] [2022-11-25 17:05:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:40,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:40,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:05:40,353 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:05:40,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:05:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:40,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:05:40,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:05:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 115 proven. 20 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-25 17:05:41,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:05:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-25 17:05:41,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:05:41,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848369118] [2022-11-25 17:05:41,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:05:41,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650085021] [2022-11-25 17:05:41,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650085021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:05:41,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:05:41,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-11-25 17:05:41,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890070062] [2022-11-25 17:05:41,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:05:41,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:05:41,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:05:41,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:05:41,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:05:41,538 INFO L87 Difference]: Start difference. First operand 151 states and 195 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 6 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) [2022-11-25 17:05:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:05:41,923 INFO L93 Difference]: Finished difference Result 274 states and 354 transitions. [2022-11-25 17:05:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:05:41,925 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 6 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) Word has length 140 [2022-11-25 17:05:41,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:05:41,941 INFO L225 Difference]: With dead ends: 274 [2022-11-25 17:05:41,941 INFO L226 Difference]: Without dead ends: 153 [2022-11-25 17:05:41,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:05:41,946 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 172 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:05:41,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 732 Invalid, 206 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [43 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:05:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-25 17:05:41,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-11-25 17:05:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 96 states have (on average 1.21875) internal successors, (117), 98 states have internal predecessors, (117), 40 states have call successors, (40), 15 states have call predecessors, (40), 16 states have return successors, (41), 39 states have call predecessors, (41), 39 states have call successors, (41) [2022-11-25 17:05:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 198 transitions. [2022-11-25 17:05:41,985 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 198 transitions. Word has length 140 [2022-11-25 17:05:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:05:41,991 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 198 transitions. [2022-11-25 17:05:41,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 6 states have call successors, (44), 3 states have call predecessors, (44), 4 states have return successors, (42), 6 states have call predecessors, (42), 6 states have call successors, (42) [2022-11-25 17:05:41,992 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 198 transitions. [2022-11-25 17:05:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-25 17:05:41,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:05:41,996 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:05:42,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:05:42,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:42,209 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:05:42,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:05:42,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1045405273, now seen corresponding path program 1 times [2022-11-25 17:05:42,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:05:42,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287651555] [2022-11-25 17:05:42,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:42,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:05:42,347 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:05:42,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671970329] [2022-11-25 17:05:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:42,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:42,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:05:42,350 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:05:42,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:05:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:43,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 2459 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:05:43,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:05:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 67 proven. 75 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 17:05:43,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:05:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-25 17:05:43,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:05:43,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287651555] [2022-11-25 17:05:43,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:05:43,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671970329] [2022-11-25 17:05:43,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671970329] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:05:43,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:05:43,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2022-11-25 17:05:43,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433587766] [2022-11-25 17:05:43,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:05:43,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:05:43,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:05:43,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:05:43,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:05:43,684 INFO L87 Difference]: Start difference. First operand 153 states and 198 transitions. Second operand has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 4 states have call predecessors, (20), 5 states have call successors, (20) [2022-11-25 17:05:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:05:44,166 INFO L93 Difference]: Finished difference Result 226 states and 294 transitions. [2022-11-25 17:05:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:05:44,167 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 4 states have call predecessors, (20), 5 states have call successors, (20) Word has length 141 [2022-11-25 17:05:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:05:44,169 INFO L225 Difference]: With dead ends: 226 [2022-11-25 17:05:44,170 INFO L226 Difference]: Without dead ends: 151 [2022-11-25 17:05:44,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:05:44,172 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 203 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:05:44,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 820 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:05:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-25 17:05:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-11-25 17:05:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 96 states have internal predecessors, (115), 40 states have call successors, (40), 15 states have call predecessors, (40), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-25 17:05:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 194 transitions. [2022-11-25 17:05:44,205 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 194 transitions. Word has length 141 [2022-11-25 17:05:44,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:05:44,208 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 194 transitions. [2022-11-25 17:05:44,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 5 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 4 states have call predecessors, (20), 5 states have call successors, (20) [2022-11-25 17:05:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 194 transitions. [2022-11-25 17:05:44,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-25 17:05:44,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:05:44,213 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:05:44,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 17:05:44,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:44,425 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:05:44,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:05:44,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1499101739, now seen corresponding path program 1 times [2022-11-25 17:05:44,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:05:44,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096799853] [2022-11-25 17:05:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:44,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:05:44,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:05:44,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668536273] [2022-11-25 17:05:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:44,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:44,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:05:44,522 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:05:44,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:05:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:45,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 2464 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:05:45,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:05:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-11-25 17:05:45,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:05:45,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:05:45,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096799853] [2022-11-25 17:05:45,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:05:45,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668536273] [2022-11-25 17:05:45,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668536273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:05:45,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:05:45,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:05:45,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886593400] [2022-11-25 17:05:45,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:05:45,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:05:45,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:05:45,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:05:45,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:05:45,377 INFO L87 Difference]: Start difference. First operand 151 states and 194 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-25 17:05:45,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:05:45,446 INFO L93 Difference]: Finished difference Result 295 states and 380 transitions. [2022-11-25 17:05:45,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:05:45,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 142 [2022-11-25 17:05:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:05:45,453 INFO L225 Difference]: With dead ends: 295 [2022-11-25 17:05:45,453 INFO L226 Difference]: Without dead ends: 156 [2022-11-25 17:05:45,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:05:45,461 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 2 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:05:45,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 759 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:05:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-25 17:05:45,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-11-25 17:05:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 99 states have (on average 1.202020202020202) internal successors, (119), 100 states have internal predecessors, (119), 40 states have call successors, (40), 15 states have call predecessors, (40), 16 states have return successors, (40), 40 states have call predecessors, (40), 39 states have call successors, (40) [2022-11-25 17:05:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 199 transitions. [2022-11-25 17:05:45,503 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 199 transitions. Word has length 142 [2022-11-25 17:05:45,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:05:45,504 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 199 transitions. [2022-11-25 17:05:45,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-25 17:05:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 199 transitions. [2022-11-25 17:05:45,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-25 17:05:45,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:05:45,511 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:05:45,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:05:45,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:45,723 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:05:45,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:05:45,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1151585641, now seen corresponding path program 1 times [2022-11-25 17:05:45,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:05:45,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740766695] [2022-11-25 17:05:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:45,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:05:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:47,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:05:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:47,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:05:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:47,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 17:05:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:47,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 17:05:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:47,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-25 17:05:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:47,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:47,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:47,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:05:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:47,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-25 17:05:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:47,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:05:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:47,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:47,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-25 17:05:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:48,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-25 17:05:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:48,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-25 17:05:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:48,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-25 17:05:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:48,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-25 17:05:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:48,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-25 17:05:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:48,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:48,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:48,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:05:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:48,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-25 17:05:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:48,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-25 17:05:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:48,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-25 17:05:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:48,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-25 17:05:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-11-25 17:05:48,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:05:48,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740766695] [2022-11-25 17:05:48,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740766695] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:05:48,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:05:48,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 17:05:48,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645389184] [2022-11-25 17:05:48,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:05:48,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:05:48,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:05:48,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:05:48,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:05:48,247 INFO L87 Difference]: Start difference. First operand 156 states and 199 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-25 17:05:49,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:05:49,600 INFO L93 Difference]: Finished difference Result 304 states and 391 transitions. [2022-11-25 17:05:49,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:05:49,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 154 [2022-11-25 17:05:49,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:05:49,603 INFO L225 Difference]: With dead ends: 304 [2022-11-25 17:05:49,603 INFO L226 Difference]: Without dead ends: 172 [2022-11-25 17:05:49,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:05:49,604 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 208 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:05:49,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 682 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 17:05:49,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-25 17:05:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 161. [2022-11-25 17:05:49,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 103 states have (on average 1.203883495145631) internal successors, (124), 105 states have internal predecessors, (124), 40 states have call successors, (40), 15 states have call predecessors, (40), 17 states have return successors, (42), 40 states have call predecessors, (42), 39 states have call successors, (42) [2022-11-25 17:05:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2022-11-25 17:05:49,623 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 154 [2022-11-25 17:05:49,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:05:49,624 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2022-11-25 17:05:49,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 9 states have internal predecessors, (59), 4 states have call successors, (23), 5 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2022-11-25 17:05:49,625 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2022-11-25 17:05:49,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-25 17:05:49,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:05:49,627 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:05:49,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:05:49,628 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:05:49,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:05:49,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1922319207, now seen corresponding path program 1 times [2022-11-25 17:05:49,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:05:49,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103600795] [2022-11-25 17:05:49,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:49,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:05:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:05:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:05:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 17:05:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 17:05:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-25 17:05:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:05:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-25 17:05:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:05:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-25 17:05:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-25 17:05:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-25 17:05:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-25 17:05:50,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-25 17:05:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-25 17:05:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:05:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-25 17:05:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-25 17:05:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-25 17:05:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-25 17:05:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-11-25 17:05:50,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:05:50,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103600795] [2022-11-25 17:05:50,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103600795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:05:50,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:05:50,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:05:50,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809479067] [2022-11-25 17:05:50,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:05:50,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:05:50,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:05:50,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:05:50,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:05:50,836 INFO L87 Difference]: Start difference. First operand 161 states and 206 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-25 17:05:51,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:05:51,665 INFO L93 Difference]: Finished difference Result 311 states and 401 transitions. [2022-11-25 17:05:51,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:05:51,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 154 [2022-11-25 17:05:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:05:51,668 INFO L225 Difference]: With dead ends: 311 [2022-11-25 17:05:51,668 INFO L226 Difference]: Without dead ends: 174 [2022-11-25 17:05:51,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:05:51,670 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 245 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:05:51,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 303 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:05:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-25 17:05:51,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 166. [2022-11-25 17:05:51,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 109 states have internal predecessors, (127), 41 states have call successors, (41), 15 states have call predecessors, (41), 18 states have return successors, (44), 41 states have call predecessors, (44), 40 states have call successors, (44) [2022-11-25 17:05:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 212 transitions. [2022-11-25 17:05:51,701 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 212 transitions. Word has length 154 [2022-11-25 17:05:51,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:05:51,703 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 212 transitions. [2022-11-25 17:05:51,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-25 17:05:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 212 transitions. [2022-11-25 17:05:51,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-25 17:05:51,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:05:51,706 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:05:51,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:05:51,707 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:05:51,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:05:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash 519277663, now seen corresponding path program 1 times [2022-11-25 17:05:51,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:05:51,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909223756] [2022-11-25 17:05:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:51,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:05:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:52,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:05:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:52,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:05:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:52,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 17:05:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:52,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 17:05:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:52,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-25 17:05:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:52,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:52,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:52,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:05:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:52,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-25 17:05:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:52,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:05:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:52,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:52,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-25 17:05:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:53,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:05:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:53,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-25 17:05:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:53,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-25 17:05:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:53,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-25 17:05:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:53,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-25 17:05:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:53,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-11-25 17:05:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:53,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:53,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:53,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:05:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:53,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-25 17:05:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:53,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-11-25 17:05:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:53,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-11-25 17:05:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:53,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-11-25 17:05:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-11-25 17:05:53,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:05:53,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909223756] [2022-11-25 17:05:53,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909223756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:05:53,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:05:53,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 17:05:53,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873392545] [2022-11-25 17:05:53,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:05:53,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:05:53,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:05:53,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:05:53,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:05:53,344 INFO L87 Difference]: Start difference. First operand 166 states and 212 transitions. Second operand has 10 states, 9 states have (on average 7.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-25 17:05:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:05:54,783 INFO L93 Difference]: Finished difference Result 319 states and 418 transitions. [2022-11-25 17:05:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:05:54,784 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 3 states have call successors, (22) Word has length 160 [2022-11-25 17:05:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:05:54,786 INFO L225 Difference]: With dead ends: 319 [2022-11-25 17:05:54,786 INFO L226 Difference]: Without dead ends: 175 [2022-11-25 17:05:54,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:05:54,788 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 108 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:05:54,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 593 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 17:05:54,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-25 17:05:54,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 166. [2022-11-25 17:05:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 106 states have (on average 1.1886792452830188) internal successors, (126), 109 states have internal predecessors, (126), 41 states have call successors, (41), 15 states have call predecessors, (41), 18 states have return successors, (44), 41 states have call predecessors, (44), 40 states have call successors, (44) [2022-11-25 17:05:54,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 211 transitions. [2022-11-25 17:05:54,815 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 211 transitions. Word has length 160 [2022-11-25 17:05:54,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:05:54,816 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 211 transitions. [2022-11-25 17:05:54,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.0) internal successors, (63), 7 states have internal predecessors, (63), 3 states have call successors, (24), 5 states have call predecessors, (24), 3 states have return successors, (22), 2 states have call predecessors, (22), 3 states have call successors, (22) [2022-11-25 17:05:54,816 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 211 transitions. [2022-11-25 17:05:54,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-25 17:05:54,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:05:54,819 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:05:54,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:05:54,820 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:05:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:05:54,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1794962801, now seen corresponding path program 1 times [2022-11-25 17:05:54,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:05:54,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767175952] [2022-11-25 17:05:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:54,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:05:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:56,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:05:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:56,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:05:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:56,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 17:05:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:56,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 17:05:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:56,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-25 17:05:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:56,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:56,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:56,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:56,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:05:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:56,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-25 17:05:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:56,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:05:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:56,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:56,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-25 17:05:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:05:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:05:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-25 17:05:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-25 17:05:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-25 17:05:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-25 17:05:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-25 17:05:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:05:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:05:57,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-25 17:05:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-25 17:05:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-25 17:05:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-11-25 17:05:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-11-25 17:05:57,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:05:57,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767175952] [2022-11-25 17:05:57,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767175952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:05:57,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375384044] [2022-11-25 17:05:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:57,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:57,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:05:57,501 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:05:57,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:05:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:58,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 2526 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:05:58,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:05:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-25 17:05:58,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:05:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-11-25 17:05:58,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375384044] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:05:58,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:05:58,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14, 8] total 22 [2022-11-25 17:05:58,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546811400] [2022-11-25 17:05:58,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:05:58,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:05:58,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:05:58,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:05:58,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:05:58,788 INFO L87 Difference]: Start difference. First operand 166 states and 211 transitions. Second operand has 5 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-25 17:05:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:05:58,889 INFO L93 Difference]: Finished difference Result 174 states and 219 transitions. [2022-11-25 17:05:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:05:58,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) Word has length 165 [2022-11-25 17:05:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:05:58,892 INFO L225 Difference]: With dead ends: 174 [2022-11-25 17:05:58,892 INFO L226 Difference]: Without dead ends: 172 [2022-11-25 17:05:58,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:05:58,895 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 6 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:05:58,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 749 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:05:58,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-25 17:05:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-11-25 17:05:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 109 states have (on average 1.18348623853211) internal successors, (129), 113 states have internal predecessors, (129), 42 states have call successors, (42), 16 states have call predecessors, (42), 19 states have return successors, (45), 41 states have call predecessors, (45), 41 states have call successors, (45) [2022-11-25 17:05:58,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 216 transitions. [2022-11-25 17:05:58,923 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 216 transitions. Word has length 165 [2022-11-25 17:05:58,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:05:58,924 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 216 transitions. [2022-11-25 17:05:58,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 1 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-25 17:05:58,925 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 216 transitions. [2022-11-25 17:05:58,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-25 17:05:58,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:05:58,929 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:05:58,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:05:59,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:59,141 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:05:59,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:05:59,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1793115759, now seen corresponding path program 1 times [2022-11-25 17:05:59,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:05:59,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613841246] [2022-11-25 17:05:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:05:59,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:05:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:59,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:05:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:59,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:05:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:59,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 17:05:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:59,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 17:05:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:59,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-25 17:05:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:06:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-25 17:06:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:06:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-25 17:06:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:06:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:06:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-25 17:06:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-25 17:06:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-25 17:06:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-25 17:06:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-25 17:06:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:06:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-25 17:06:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-25 17:06:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-25 17:06:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-11-25 17:06:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-11-25 17:06:00,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:06:00,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613841246] [2022-11-25 17:06:00,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613841246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:06:00,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:06:00,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:06:00,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220769911] [2022-11-25 17:06:00,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:06:00,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:06:00,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:06:00,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:06:00,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:06:00,426 INFO L87 Difference]: Start difference. First operand 171 states and 216 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 5 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-25 17:06:01,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:06:01,439 INFO L93 Difference]: Finished difference Result 263 states and 339 transitions. [2022-11-25 17:06:01,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:06:01,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 5 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 165 [2022-11-25 17:06:01,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:06:01,442 INFO L225 Difference]: With dead ends: 263 [2022-11-25 17:06:01,442 INFO L226 Difference]: Without dead ends: 192 [2022-11-25 17:06:01,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:06:01,443 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 239 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:06:01,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 393 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 17:06:01,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-25 17:06:01,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 174. [2022-11-25 17:06:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 115 states have internal predecessors, (131), 43 states have call successors, (43), 16 states have call predecessors, (43), 19 states have return successors, (46), 42 states have call predecessors, (46), 42 states have call successors, (46) [2022-11-25 17:06:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 220 transitions. [2022-11-25 17:06:01,483 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 220 transitions. Word has length 165 [2022-11-25 17:06:01,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:06:01,484 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 220 transitions. [2022-11-25 17:06:01,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 5 states have internal predecessors, (64), 3 states have call successors, (25), 5 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-25 17:06:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 220 transitions. [2022-11-25 17:06:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-11-25 17:06:01,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:06:01,488 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:06:01,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:06:01,489 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:06:01,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:06:01,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1534950321, now seen corresponding path program 1 times [2022-11-25 17:06:01,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:06:01,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532019878] [2022-11-25 17:06:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:01,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:06:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:06:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:06:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 17:06:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 17:06:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-25 17:06:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:06:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-25 17:06:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:06:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-25 17:06:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:06:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:06:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-25 17:06:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-25 17:06:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:03,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-25 17:06:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:04,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-25 17:06:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:04,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-25 17:06:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:04,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:04,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:04,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:06:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:04,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-25 17:06:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:04,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-11-25 17:06:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:04,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2022-11-25 17:06:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:04,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-11-25 17:06:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-11-25 17:06:04,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:06:04,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532019878] [2022-11-25 17:06:04,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532019878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:06:04,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368878296] [2022-11-25 17:06:04,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:04,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:04,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:06:04,151 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:06:04,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:06:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:04,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 2532 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:06:04,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:06:05,102 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 [2022-11-25 17:06:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-25 17:06:05,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:06:05,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368878296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:06:05,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:06:05,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 21 [2022-11-25 17:06:05,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79823108] [2022-11-25 17:06:05,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:06:05,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:06:05,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:06:05,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:06:05,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:06:05,582 INFO L87 Difference]: Start difference. First operand 174 states and 220 transitions. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2022-11-25 17:06:07,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:06:09,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:06:11,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:06:13,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:06:15,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:06:17,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:06:19,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:06:21,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:06:23,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:06:26,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:06:28,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:06:30,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:06:32,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:06:33,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:06:33,534 INFO L93 Difference]: Finished difference Result 454 states and 573 transitions. [2022-11-25 17:06:33,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:06:33,535 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 165 [2022-11-25 17:06:33,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:06:33,538 INFO L225 Difference]: With dead ends: 454 [2022-11-25 17:06:33,539 INFO L226 Difference]: Without dead ends: 310 [2022-11-25 17:06:33,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-11-25 17:06:33,541 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 336 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 141 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:06:33,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 884 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 427 Invalid, 13 Unknown, 0 Unchecked, 27.6s Time] [2022-11-25 17:06:33,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-25 17:06:33,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 304. [2022-11-25 17:06:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 197 states have (on average 1.1979695431472082) internal successors, (236), 204 states have internal predecessors, (236), 71 states have call successors, (71), 30 states have call predecessors, (71), 35 states have return successors, (80), 69 states have call predecessors, (80), 69 states have call successors, (80) [2022-11-25 17:06:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 387 transitions. [2022-11-25 17:06:33,593 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 387 transitions. Word has length 165 [2022-11-25 17:06:33,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:06:33,594 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 387 transitions. [2022-11-25 17:06:33,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2022-11-25 17:06:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 387 transitions. [2022-11-25 17:06:33,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-25 17:06:33,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:06:33,599 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:06:33,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:06:33,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:06:33,822 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:06:33,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:06:33,822 INFO L85 PathProgramCache]: Analyzing trace with hash 340437638, now seen corresponding path program 1 times [2022-11-25 17:06:33,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:06:33,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873598027] [2022-11-25 17:06:33,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:33,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:06:33,936 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:06:33,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296657024] [2022-11-25 17:06:33,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:33,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:33,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:06:33,938 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:06:33,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:06:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:34,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 2663 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:06:34,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:06:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-25 17:06:34,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:06:34,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:06:34,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873598027] [2022-11-25 17:06:34,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:06:34,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296657024] [2022-11-25 17:06:34,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296657024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:06:34,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:06:34,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:06:34,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77011528] [2022-11-25 17:06:34,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:06:34,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:06:34,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:06:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:06:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:06:34,820 INFO L87 Difference]: Start difference. First operand 304 states and 387 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-25 17:06:34,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:06:34,940 INFO L93 Difference]: Finished difference Result 586 states and 747 transitions. [2022-11-25 17:06:34,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:06:34,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) Word has length 180 [2022-11-25 17:06:34,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:06:34,948 INFO L225 Difference]: With dead ends: 586 [2022-11-25 17:06:34,948 INFO L226 Difference]: Without dead ends: 309 [2022-11-25 17:06:34,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:06:34,951 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 2 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:06:34,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 755 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:06:34,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-11-25 17:06:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2022-11-25 17:06:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 201 states have (on average 1.1940298507462686) internal successors, (240), 208 states have internal predecessors, (240), 71 states have call successors, (71), 30 states have call predecessors, (71), 36 states have return successors, (81), 70 states have call predecessors, (81), 69 states have call successors, (81) [2022-11-25 17:06:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 392 transitions. [2022-11-25 17:06:35,015 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 392 transitions. Word has length 180 [2022-11-25 17:06:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:06:35,015 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 392 transitions. [2022-11-25 17:06:35,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-25 17:06:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 392 transitions. [2022-11-25 17:06:35,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-25 17:06:35,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:06:35,019 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:06:35,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 17:06:35,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:06:35,231 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:06:35,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:06:35,232 INFO L85 PathProgramCache]: Analyzing trace with hash -53797886, now seen corresponding path program 1 times [2022-11-25 17:06:35,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:06:35,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456986875] [2022-11-25 17:06:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:35,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:06:35,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:06:35,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729375798] [2022-11-25 17:06:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:35,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:35,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:06:35,344 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:06:35,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:06:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:36,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:06:36,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:06:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-25 17:06:36,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:06:36,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:06:36,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456986875] [2022-11-25 17:06:36,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:06:36,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729375798] [2022-11-25 17:06:36,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729375798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:06:36,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:06:36,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 17:06:36,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81325070] [2022-11-25 17:06:36,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:06:36,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:06:36,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:06:36,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:06:36,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:06:36,275 INFO L87 Difference]: Start difference. First operand 309 states and 392 transitions. Second operand has 9 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-25 17:06:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:06:36,554 INFO L93 Difference]: Finished difference Result 589 states and 758 transitions. [2022-11-25 17:06:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:06:36,555 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 186 [2022-11-25 17:06:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:06:36,558 INFO L225 Difference]: With dead ends: 589 [2022-11-25 17:06:36,558 INFO L226 Difference]: Without dead ends: 324 [2022-11-25 17:06:36,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:06:36,561 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 2 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:06:36,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1382 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:06:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-25 17:06:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 320. [2022-11-25 17:06:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 209 states have (on average 1.186602870813397) internal successors, (248), 217 states have internal predecessors, (248), 71 states have call successors, (71), 30 states have call predecessors, (71), 39 states have return successors, (85), 72 states have call predecessors, (85), 69 states have call successors, (85) [2022-11-25 17:06:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 404 transitions. [2022-11-25 17:06:36,605 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 404 transitions. Word has length 186 [2022-11-25 17:06:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:06:36,606 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 404 transitions. [2022-11-25 17:06:36,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.5) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (31), 2 states have call predecessors, (31), 5 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2022-11-25 17:06:36,606 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 404 transitions. [2022-11-25 17:06:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-25 17:06:36,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:06:36,609 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:06:36,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:06:36,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:36,821 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:06:36,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:06:36,821 INFO L85 PathProgramCache]: Analyzing trace with hash -12004318, now seen corresponding path program 1 times [2022-11-25 17:06:36,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:06:36,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863253575] [2022-11-25 17:06:36,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:36,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:06:36,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:06:36,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945827343] [2022-11-25 17:06:36,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:36,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:36,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:06:36,933 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:06:36,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:06:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:37,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 2732 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:06:37,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:06:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-25 17:06:37,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:06:37,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:06:37,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863253575] [2022-11-25 17:06:37,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:06:37,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945827343] [2022-11-25 17:06:37,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945827343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:06:37,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:06:37,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:06:37,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947420546] [2022-11-25 17:06:37,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:06:37,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:06:37,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:06:37,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:06:37,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:06:37,794 INFO L87 Difference]: Start difference. First operand 320 states and 404 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-25 17:06:37,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:06:37,852 INFO L93 Difference]: Finished difference Result 585 states and 750 transitions. [2022-11-25 17:06:37,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:06:37,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 199 [2022-11-25 17:06:37,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:06:37,856 INFO L225 Difference]: With dead ends: 585 [2022-11-25 17:06:37,856 INFO L226 Difference]: Without dead ends: 310 [2022-11-25 17:06:37,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:06:37,860 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 2 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:06:37,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 568 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:06:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-25 17:06:37,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2022-11-25 17:06:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 203 states have (on average 1.1822660098522169) internal successors, (240), 209 states have internal predecessors, (240), 69 states have call successors, (69), 30 states have call predecessors, (69), 37 states have return successors, (81), 70 states have call predecessors, (81), 67 states have call successors, (81) [2022-11-25 17:06:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 390 transitions. [2022-11-25 17:06:37,896 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 390 transitions. Word has length 199 [2022-11-25 17:06:37,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:06:37,898 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 390 transitions. [2022-11-25 17:06:37,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-25 17:06:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 390 transitions. [2022-11-25 17:06:37,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-25 17:06:37,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:06:37,901 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:06:37,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:06:38,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:06:38,113 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:06:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:06:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1894398948, now seen corresponding path program 1 times [2022-11-25 17:06:38,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:06:38,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924760646] [2022-11-25 17:06:38,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:38,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:06:38,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:06:38,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704768517] [2022-11-25 17:06:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:38,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:38,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:06:38,238 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:06:38,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:06:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 2737 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:06:38,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:06:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-25 17:06:39,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:06:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-11-25 17:06:39,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:06:39,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924760646] [2022-11-25 17:06:39,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:06:39,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704768517] [2022-11-25 17:06:39,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704768517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:06:39,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:06:39,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2022-11-25 17:06:39,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102180153] [2022-11-25 17:06:39,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:06:39,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:06:39,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:06:39,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:06:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:06:39,532 INFO L87 Difference]: Start difference. First operand 310 states and 390 transitions. Second operand has 12 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 5 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 5 states have call successors, (31) [2022-11-25 17:06:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:06:39,843 INFO L93 Difference]: Finished difference Result 491 states and 622 transitions. [2022-11-25 17:06:39,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:06:39,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 5 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 5 states have call successors, (31) Word has length 199 [2022-11-25 17:06:39,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:06:39,851 INFO L225 Difference]: With dead ends: 491 [2022-11-25 17:06:39,851 INFO L226 Difference]: Without dead ends: 315 [2022-11-25 17:06:39,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:06:39,853 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 4 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:06:39,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1562 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:06:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-25 17:06:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 312. [2022-11-25 17:06:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 204 states have (on average 1.1813725490196079) internal successors, (241), 211 states have internal predecessors, (241), 69 states have call successors, (69), 30 states have call predecessors, (69), 38 states have return successors, (82), 70 states have call predecessors, (82), 67 states have call successors, (82) [2022-11-25 17:06:39,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 392 transitions. [2022-11-25 17:06:39,886 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 392 transitions. Word has length 199 [2022-11-25 17:06:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:06:39,887 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 392 transitions. [2022-11-25 17:06:39,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 5 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 5 states have call successors, (31) [2022-11-25 17:06:39,887 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 392 transitions. [2022-11-25 17:06:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-25 17:06:39,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:06:39,890 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:06:39,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:06:40,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:40,101 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:06:40,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:06:40,101 INFO L85 PathProgramCache]: Analyzing trace with hash -915948491, now seen corresponding path program 1 times [2022-11-25 17:06:40,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:06:40,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056777289] [2022-11-25 17:06:40,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:40,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:06:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:41,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:06:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:41,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 17:06:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:41,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-25 17:06:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:41,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 17:06:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:41,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-25 17:06:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:41,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:41,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:41,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:06:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:41,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-25 17:06:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:06:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-25 17:06:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:06:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:06:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-11-25 17:06:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-25 17:06:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-25 17:06:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 17:06:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:06:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:06:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-11-25 17:06:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-11-25 17:06:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 17:06:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 17:06:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-11-25 17:06:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-11-25 17:06:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 17:06:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 17:06:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:06:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-11-25 17:06:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-11-25 17:06:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-11-25 17:06:42,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:06:42,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056777289] [2022-11-25 17:06:42,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056777289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:06:42,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522149525] [2022-11-25 17:06:42,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:42,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:42,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:06:42,427 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:06:42,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:06:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:43,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 2726 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:06:43,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:06:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-25 17:06:43,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:06:43,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522149525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:06:43,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:06:43,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 10 [2022-11-25 17:06:43,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652371759] [2022-11-25 17:06:43,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:06:43,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:06:43,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:06:43,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:06:43,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:06:43,228 INFO L87 Difference]: Start difference. First operand 312 states and 392 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-25 17:06:43,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:06:43,388 INFO L93 Difference]: Finished difference Result 601 states and 754 transitions. [2022-11-25 17:06:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:06:43,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 209 [2022-11-25 17:06:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:06:43,391 INFO L225 Difference]: With dead ends: 601 [2022-11-25 17:06:43,391 INFO L226 Difference]: Without dead ends: 316 [2022-11-25 17:06:43,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:06:43,394 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 2 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:06:43,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 865 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:06:43,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-25 17:06:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 314. [2022-11-25 17:06:43,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 205 states have (on average 1.1804878048780487) internal successors, (242), 213 states have internal predecessors, (242), 69 states have call successors, (69), 30 states have call predecessors, (69), 39 states have return successors, (83), 70 states have call predecessors, (83), 67 states have call successors, (83) [2022-11-25 17:06:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 394 transitions. [2022-11-25 17:06:43,429 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 394 transitions. Word has length 209 [2022-11-25 17:06:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:06:43,429 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 394 transitions. [2022-11-25 17:06:43,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-25 17:06:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 394 transitions. [2022-11-25 17:06:43,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-25 17:06:43,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:06:43,432 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:06:43,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:06:43,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:43,648 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:06:43,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:06:43,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1627284530, now seen corresponding path program 1 times [2022-11-25 17:06:43,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:06:43,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542417373] [2022-11-25 17:06:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:43,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:06:43,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:06:43,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045526983] [2022-11-25 17:06:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:43,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:43,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:06:43,725 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:06:43,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:06:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:44,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 2831 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:06:44,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:06:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 147 proven. 3 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-11-25 17:06:44,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:06:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-11-25 17:06:45,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:06:45,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542417373] [2022-11-25 17:06:45,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:06:45,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045526983] [2022-11-25 17:06:45,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045526983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:06:45,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:06:45,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2022-11-25 17:06:45,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498624026] [2022-11-25 17:06:45,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:06:45,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:06:45,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:06:45,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:06:45,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:06:45,007 INFO L87 Difference]: Start difference. First operand 314 states and 394 transitions. Second operand has 12 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 5 states have call successors, (35) [2022-11-25 17:06:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:06:45,292 INFO L93 Difference]: Finished difference Result 518 states and 655 transitions. [2022-11-25 17:06:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:06:45,293 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 5 states have call successors, (35) Word has length 215 [2022-11-25 17:06:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:06:45,295 INFO L225 Difference]: With dead ends: 518 [2022-11-25 17:06:45,295 INFO L226 Difference]: Without dead ends: 315 [2022-11-25 17:06:45,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 417 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:06:45,297 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 4 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:06:45,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1890 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:06:45,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-11-25 17:06:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 308. [2022-11-25 17:06:45,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 200 states have (on average 1.165) internal successors, (233), 209 states have internal predecessors, (233), 69 states have call successors, (69), 30 states have call predecessors, (69), 38 states have return successors, (82), 68 states have call predecessors, (82), 67 states have call successors, (82) [2022-11-25 17:06:45,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 384 transitions. [2022-11-25 17:06:45,328 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 384 transitions. Word has length 215 [2022-11-25 17:06:45,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:06:45,328 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 384 transitions. [2022-11-25 17:06:45,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 5 states have call successors, (35) [2022-11-25 17:06:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 384 transitions. [2022-11-25 17:06:45,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-11-25 17:06:45,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:06:45,331 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:06:45,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:06:45,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:06:45,541 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:06:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:06:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash -569184875, now seen corresponding path program 1 times [2022-11-25 17:06:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:06:45,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116725998] [2022-11-25 17:06:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:45,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:06:45,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:06:45,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205393053] [2022-11-25 17:06:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:45,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:45,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:06:45,620 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:06:45,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:06:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:46,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 2936 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:06:46,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:06:46,576 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 9 treesize of output 3 [2022-11-25 17:06:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-25 17:06:46,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:06:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-11-25 17:06:47,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:06:47,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116725998] [2022-11-25 17:06:47,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:06:47,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205393053] [2022-11-25 17:06:47,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205393053] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:06:47,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:06:47,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 15 [2022-11-25 17:06:47,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354394002] [2022-11-25 17:06:47,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:06:47,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:06:47,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:06:47,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:06:47,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:06:47,131 INFO L87 Difference]: Start difference. First operand 308 states and 384 transitions. Second operand has 9 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-25 17:06:47,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:06:47,691 INFO L93 Difference]: Finished difference Result 336 states and 421 transitions. [2022-11-25 17:06:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:06:47,693 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 221 [2022-11-25 17:06:47,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:06:47,695 INFO L225 Difference]: With dead ends: 336 [2022-11-25 17:06:47,695 INFO L226 Difference]: Without dead ends: 334 [2022-11-25 17:06:47,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 426 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:06:47,697 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 18 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:06:47,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 979 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:06:47,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-25 17:06:47,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 306. [2022-11-25 17:06:47,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 200 states have (on average 1.165) internal successors, (233), 207 states have internal predecessors, (233), 67 states have call successors, (67), 30 states have call predecessors, (67), 38 states have return successors, (80), 68 states have call predecessors, (80), 65 states have call successors, (80) [2022-11-25 17:06:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 380 transitions. [2022-11-25 17:06:47,728 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 380 transitions. Word has length 221 [2022-11-25 17:06:47,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:06:47,728 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 380 transitions. [2022-11-25 17:06:47,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 10.571428571428571) internal successors, (74), 8 states have internal predecessors, (74), 3 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-25 17:06:47,729 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 380 transitions. [2022-11-25 17:06:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-11-25 17:06:47,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:06:47,731 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:06:47,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:06:47,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:06:47,942 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:06:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:06:47,942 INFO L85 PathProgramCache]: Analyzing trace with hash 819896616, now seen corresponding path program 1 times [2022-11-25 17:06:47,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:06:47,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435055300] [2022-11-25 17:06:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:47,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:06:48,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:06:48,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349787467] [2022-11-25 17:06:48,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:06:48,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:06:48,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:06:48,036 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:06:48,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:06:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:06:49,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 2941 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-25 17:06:49,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:06:49,306 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 [2022-11-25 17:06:49,989 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 17:06:49,989 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 [2022-11-25 17:06:50,219 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2183 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2183))) is different from true [2022-11-25 17:06:50,353 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2184 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_2184) |c_#memory_int|)) is different from true [2022-11-25 17:06:50,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:06:50,478 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:06:50,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 35 [2022-11-25 17:06:50,512 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-25 17:06:50,512 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 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:07:04,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:07:04,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 30 treesize of output 14 [2022-11-25 17:07:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 162 proven. 74 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 17:07:04,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:07:06,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:07:06,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435055300] [2022-11-25 17:07:06,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:07:06,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349787467] [2022-11-25 17:07:06,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349787467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:07:06,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:07:06,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-11-25 17:07:06,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165553217] [2022-11-25 17:07:06,056 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:07:06,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 17:07:06,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:07:06,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 17:07:06,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1647, Unknown=22, NotChecked=166, Total=1980 [2022-11-25 17:07:06,059 INFO L87 Difference]: Start difference. First operand 306 states and 380 transitions. Second operand has 35 states, 30 states have (on average 4.466666666666667) internal successors, (134), 29 states have internal predecessors, (134), 18 states have call successors, (37), 8 states have call predecessors, (37), 10 states have return successors, (35), 16 states have call predecessors, (35), 17 states have call successors, (35) [2022-11-25 17:07:08,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:11,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:13,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:15,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:17,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:07:21,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:24,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:26,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:30,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:32,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:34,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:36,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:38,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:38,875 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.base_BEFORE_CALL_18| Int)) (= (select |c_#valid| |v_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.base_BEFORE_CALL_18|) 1)) (exists ((v_ArrVal_2184 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_2184) |c_#memory_int|))) is different from true [2022-11-25 17:07:40,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:42,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:44,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:47,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:49,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:51,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:53,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:55,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:57,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:07:59,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:01,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:04,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:06,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:11,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:14,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:08:16,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:19,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:21,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:26,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:31,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:33,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:35,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:08:35,432 INFO L93 Difference]: Finished difference Result 749 states and 929 transitions. [2022-11-25 17:08:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-25 17:08:35,432 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 4.466666666666667) internal successors, (134), 29 states have internal predecessors, (134), 18 states have call successors, (37), 8 states have call predecessors, (37), 10 states have return successors, (35), 16 states have call predecessors, (35), 17 states have call successors, (35) Word has length 227 [2022-11-25 17:08:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:08:35,438 INFO L225 Difference]: With dead ends: 749 [2022-11-25 17:08:35,438 INFO L226 Difference]: Without dead ends: 735 [2022-11-25 17:08:35,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 81 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=518, Invalid=5756, Unknown=58, NotChecked=474, Total=6806 [2022-11-25 17:08:35,447 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 528 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 5737 mSolverCounterSat, 351 mSolverCounterUnsat, 171 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 6999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 5737 IncrementalHoareTripleChecker+Invalid, 171 IncrementalHoareTripleChecker+Unknown, 740 IncrementalHoareTripleChecker+Unchecked, 81.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:08:35,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 1160 Invalid, 6999 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [351 Valid, 5737 Invalid, 171 Unknown, 740 Unchecked, 81.8s Time] [2022-11-25 17:08:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-11-25 17:08:35,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 560. [2022-11-25 17:08:35,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 373 states have (on average 1.158176943699732) internal successors, (432), 385 states have internal predecessors, (432), 112 states have call successors, (112), 57 states have call predecessors, (112), 74 states have return successors, (145), 117 states have call predecessors, (145), 108 states have call successors, (145) [2022-11-25 17:08:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 689 transitions. [2022-11-25 17:08:35,537 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 689 transitions. Word has length 227 [2022-11-25 17:08:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:08:35,538 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 689 transitions. [2022-11-25 17:08:35,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 4.466666666666667) internal successors, (134), 29 states have internal predecessors, (134), 18 states have call successors, (37), 8 states have call predecessors, (37), 10 states have return successors, (35), 16 states have call predecessors, (35), 17 states have call successors, (35) [2022-11-25 17:08:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 689 transitions. [2022-11-25 17:08:35,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-25 17:08:35,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:08:35,541 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:08:35,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:08:35,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:08:35,764 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:08:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:35,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1669224101, now seen corresponding path program 1 times [2022-11-25 17:08:35,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:35,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213146452] [2022-11-25 17:08:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:35,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:35,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:08:35,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455520414] [2022-11-25 17:08:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:35,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:08:35,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:08:35,879 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:08:35,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:08:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:36,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 2952 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:08:36,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:08:37,315 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 17:08:37,315 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 22 treesize of output 10 [2022-11-25 17:08:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-25 17:08:37,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:08:37,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:37,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213146452] [2022-11-25 17:08:37,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:08:37,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455520414] [2022-11-25 17:08:37,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455520414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:37,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:37,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 17:08:37,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378196004] [2022-11-25 17:08:37,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:37,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:08:37,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:37,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:08:37,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:08:37,328 INFO L87 Difference]: Start difference. First operand 560 states and 689 transitions. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 5 states have call successors, (37), 3 states have call predecessors, (37), 4 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) [2022-11-25 17:08:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:08:39,550 INFO L93 Difference]: Finished difference Result 1213 states and 1497 transitions. [2022-11-25 17:08:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:08:39,551 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 5 states have call successors, (37), 3 states have call predecessors, (37), 4 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) Word has length 230 [2022-11-25 17:08:39,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:08:39,557 INFO L225 Difference]: With dead ends: 1213 [2022-11-25 17:08:39,558 INFO L226 Difference]: Without dead ends: 938 [2022-11-25 17:08:39,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:08:39,560 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 134 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:08:39,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1114 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-25 17:08:39,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-11-25 17:08:39,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 602. [2022-11-25 17:08:39,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 402 states have (on average 1.1517412935323383) internal successors, (463), 416 states have internal predecessors, (463), 119 states have call successors, (119), 62 states have call predecessors, (119), 80 states have return successors, (153), 123 states have call predecessors, (153), 115 states have call successors, (153) [2022-11-25 17:08:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 735 transitions. [2022-11-25 17:08:39,664 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 735 transitions. Word has length 230 [2022-11-25 17:08:39,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:08:39,665 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 735 transitions. [2022-11-25 17:08:39,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 5 states have call successors, (37), 3 states have call predecessors, (37), 4 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) [2022-11-25 17:08:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 735 transitions. [2022-11-25 17:08:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-25 17:08:39,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:08:39,669 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:08:39,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:08:39,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:08:39,883 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:08:39,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:08:39,884 INFO L85 PathProgramCache]: Analyzing trace with hash 2087112803, now seen corresponding path program 1 times [2022-11-25 17:08:39,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:08:39,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508011080] [2022-11-25 17:08:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:39,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:08:39,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:08:39,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621077747] [2022-11-25 17:08:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:08:39,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:08:39,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:08:39,976 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:08:39,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:08:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:08:41,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 2955 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 17:08:41,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:08:41,035 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 [2022-11-25 17:08:41,538 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 17:08:41,538 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 22 treesize of output 10 [2022-11-25 17:08:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-25 17:08:41,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:08:41,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:08:41,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508011080] [2022-11-25 17:08:41,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:08:41,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621077747] [2022-11-25 17:08:41,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621077747] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:08:41,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:08:41,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 17:08:41,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966276061] [2022-11-25 17:08:41,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:08:41,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:08:41,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:08:41,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:08:41,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:08:41,557 INFO L87 Difference]: Start difference. First operand 602 states and 735 transitions. Second operand has 12 states, 11 states have (on average 12.181818181818182) internal successors, (134), 12 states have internal predecessors, (134), 6 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 5 states have call predecessors, (35), 6 states have call successors, (35) [2022-11-25 17:08:44,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:08:46,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:48,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:50,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:52,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:08:55,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:57,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:08:59,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:09:01,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:09:03,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:09:04,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:04,221 INFO L93 Difference]: Finished difference Result 1213 states and 1490 transitions. [2022-11-25 17:09:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:09:04,222 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 12.181818181818182) internal successors, (134), 12 states have internal predecessors, (134), 6 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 5 states have call predecessors, (35), 6 states have call successors, (35) Word has length 230 [2022-11-25 17:09:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:04,227 INFO L225 Difference]: With dead ends: 1213 [2022-11-25 17:09:04,227 INFO L226 Difference]: Without dead ends: 739 [2022-11-25 17:09:04,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:09:04,230 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 147 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 26 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:04,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1732 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 786 Invalid, 10 Unknown, 0 Unchecked, 22.3s Time] [2022-11-25 17:09:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2022-11-25 17:09:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 601. [2022-11-25 17:09:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 402 states have (on average 1.144278606965174) internal successors, (460), 415 states have internal predecessors, (460), 118 states have call successors, (118), 63 states have call predecessors, (118), 80 states have return successors, (151), 122 states have call predecessors, (151), 114 states have call successors, (151) [2022-11-25 17:09:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 729 transitions. [2022-11-25 17:09:04,340 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 729 transitions. Word has length 230 [2022-11-25 17:09:04,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:04,341 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 729 transitions. [2022-11-25 17:09:04,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 12.181818181818182) internal successors, (134), 12 states have internal predecessors, (134), 6 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 5 states have call predecessors, (35), 6 states have call successors, (35) [2022-11-25 17:09:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 729 transitions. [2022-11-25 17:09:04,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-11-25 17:09:04,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:04,344 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:04,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:04,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:04,559 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:04,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:04,560 INFO L85 PathProgramCache]: Analyzing trace with hash 391733680, now seen corresponding path program 1 times [2022-11-25 17:09:04,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:04,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154025961] [2022-11-25 17:09:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:04,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:04,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:09:04,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014188969] [2022-11-25 17:09:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:04,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:04,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:04,650 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:04,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:09:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:05,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 2964 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:09:05,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:05,791 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 [2022-11-25 17:09:06,217 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 17:09:06,218 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 22 treesize of output 10 [2022-11-25 17:09:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-25 17:09:06,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:09:06,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:06,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154025961] [2022-11-25 17:09:06,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:09:06,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014188969] [2022-11-25 17:09:06,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014188969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:09:06,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:09:06,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 17:09:06,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297543367] [2022-11-25 17:09:06,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:09:06,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:09:06,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:06,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:09:06,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:09:06,231 INFO L87 Difference]: Start difference. First operand 601 states and 729 transitions. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 5 states have call successors, (37), 3 states have call predecessors, (37), 4 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) [2022-11-25 17:09:08,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:08,768 INFO L93 Difference]: Finished difference Result 1035 states and 1268 transitions. [2022-11-25 17:09:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:09:08,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 5 states have call successors, (37), 3 states have call predecessors, (37), 4 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) Word has length 231 [2022-11-25 17:09:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:08,775 INFO L225 Difference]: With dead ends: 1035 [2022-11-25 17:09:08,775 INFO L226 Difference]: Without dead ends: 758 [2022-11-25 17:09:08,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 221 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:09:08,778 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 136 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:08,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1316 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-25 17:09:08,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-11-25 17:09:08,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 594. [2022-11-25 17:09:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 397 states have (on average 1.141057934508816) internal successors, (453), 409 states have internal predecessors, (453), 117 states have call successors, (117), 63 states have call predecessors, (117), 79 states have return successors, (149), 121 states have call predecessors, (149), 113 states have call successors, (149) [2022-11-25 17:09:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 719 transitions. [2022-11-25 17:09:08,908 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 719 transitions. Word has length 231 [2022-11-25 17:09:08,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:08,909 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 719 transitions. [2022-11-25 17:09:08,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 5 states have call successors, (37), 3 states have call predecessors, (37), 4 states have return successors, (35), 5 states have call predecessors, (35), 5 states have call successors, (35) [2022-11-25 17:09:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 719 transitions. [2022-11-25 17:09:08,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-11-25 17:09:08,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:08,912 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:08,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:09,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:09,133 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:09,134 INFO L85 PathProgramCache]: Analyzing trace with hash 461381554, now seen corresponding path program 1 times [2022-11-25 17:09:09,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:09,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986343589] [2022-11-25 17:09:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:09,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:09,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:09:09,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695842643] [2022-11-25 17:09:09,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:09,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:09,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:09,233 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:09,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:09:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:10,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 2967 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-25 17:09:10,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:10,383 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 [2022-11-25 17:09:10,389 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 6 treesize of output 5 [2022-11-25 17:09:10,949 INFO L321 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-25 17:09:10,950 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 [2022-11-25 17:09:11,042 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 [2022-11-25 17:09:11,046 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 7 treesize of output 3 [2022-11-25 17:09:11,162 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2900 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2900) |c_#memory_int|)) is different from true [2022-11-25 17:09:11,323 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2901 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_2901))) is different from true [2022-11-25 17:09:11,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:09:11,454 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:09:11,455 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 1 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 17:09:11,471 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:09:11,471 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 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 17:09:12,217 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 17:09:12,218 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 22 treesize of output 10 [2022-11-25 17:09:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 191 proven. 35 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:09:12,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:09:13,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986343589] [2022-11-25 17:09:13,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:09:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695842643] [2022-11-25 17:09:13,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695842643] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:09:13,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:09:13,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-11-25 17:09:13,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345622056] [2022-11-25 17:09:13,415 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:09:13,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:09:13,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:09:13,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1216, Unknown=6, NotChecked=142, Total=1482 [2022-11-25 17:09:13,418 INFO L87 Difference]: Start difference. First operand 594 states and 719 transitions. Second operand has 27 states, 24 states have (on average 5.708333333333333) internal successors, (137), 23 states have internal predecessors, (137), 15 states have call successors, (37), 8 states have call predecessors, (37), 10 states have return successors, (35), 13 states have call predecessors, (35), 15 states have call successors, (35) [2022-11-25 17:09:26,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:26,542 INFO L93 Difference]: Finished difference Result 904 states and 1111 transitions. [2022-11-25 17:09:26,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 17:09:26,546 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 5.708333333333333) internal successors, (137), 23 states have internal predecessors, (137), 15 states have call successors, (37), 8 states have call predecessors, (37), 10 states have return successors, (35), 13 states have call predecessors, (35), 15 states have call successors, (35) Word has length 231 [2022-11-25 17:09:26,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:26,551 INFO L225 Difference]: With dead ends: 904 [2022-11-25 17:09:26,552 INFO L226 Difference]: Without dead ends: 724 [2022-11-25 17:09:26,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 261 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=335, Invalid=3390, Unknown=65, NotChecked=242, Total=4032 [2022-11-25 17:09:26,555 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 287 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 4785 mSolverCounterSat, 178 mSolverCounterUnsat, 69 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 5855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 4785 IncrementalHoareTripleChecker+Invalid, 69 IncrementalHoareTripleChecker+Unknown, 823 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:26,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 1125 Invalid, 5855 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [178 Valid, 4785 Invalid, 69 Unknown, 823 Unchecked, 11.1s Time] [2022-11-25 17:09:26,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-11-25 17:09:26,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 712. [2022-11-25 17:09:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 477 states have (on average 1.1446540880503144) internal successors, (546), 492 states have internal predecessors, (546), 139 states have call successors, (139), 75 states have call predecessors, (139), 95 states have return successors, (178), 144 states have call predecessors, (178), 134 states have call successors, (178) [2022-11-25 17:09:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 863 transitions. [2022-11-25 17:09:26,675 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 863 transitions. Word has length 231 [2022-11-25 17:09:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:26,676 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 863 transitions. [2022-11-25 17:09:26,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 5.708333333333333) internal successors, (137), 23 states have internal predecessors, (137), 15 states have call successors, (37), 8 states have call predecessors, (37), 10 states have return successors, (35), 13 states have call predecessors, (35), 15 states have call successors, (35) [2022-11-25 17:09:26,676 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 863 transitions. [2022-11-25 17:09:26,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-25 17:09:26,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:26,680 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:26,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:26,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:26,895 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:26,895 INFO L85 PathProgramCache]: Analyzing trace with hash 149725546, now seen corresponding path program 1 times [2022-11-25 17:09:26,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:26,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046804202] [2022-11-25 17:09:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:26,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:26,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:09:26,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248356614] [2022-11-25 17:09:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:26,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:26,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:26,987 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:26,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:09:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:28,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 2986 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-25 17:09:28,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:28,403 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 [2022-11-25 17:09:28,802 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 17:09:28,803 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 [2022-11-25 17:09:28,990 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3124 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_3124))) is different from true [2022-11-25 17:09:29,193 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3125 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_3125) |c_#memory_int|)) is different from true [2022-11-25 17:09:29,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:09:29,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 17:09:29,353 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-25 17:09:29,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-11-25 17:09:29,466 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 6 treesize of output 5 [2022-11-25 17:09:29,482 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 6 treesize of output 5 [2022-11-25 17:09:30,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:09:30,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 30 treesize of output 14 [2022-11-25 17:09:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 123 proven. 91 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-25 17:09:31,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:09:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-11-25 17:09:33,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:33,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046804202] [2022-11-25 17:09:33,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:09:33,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248356614] [2022-11-25 17:09:33,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248356614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:09:33,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:09:33,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 14] total 48 [2022-11-25 17:09:33,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580574186] [2022-11-25 17:09:33,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:09:33,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-25 17:09:33,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:33,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-25 17:09:33,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1906, Unknown=15, NotChecked=178, Total=2256 [2022-11-25 17:09:33,713 INFO L87 Difference]: Start difference. First operand 712 states and 863 transitions. Second operand has 48 states, 40 states have (on average 4.05) internal successors, (162), 39 states have internal predecessors, (162), 24 states have call successors, (50), 8 states have call predecessors, (50), 11 states have return successors, (47), 20 states have call predecessors, (47), 21 states have call successors, (47) [2022-11-25 17:09:48,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:48,973 INFO L93 Difference]: Finished difference Result 992 states and 1255 transitions. [2022-11-25 17:09:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 17:09:48,974 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 40 states have (on average 4.05) internal successors, (162), 39 states have internal predecessors, (162), 24 states have call successors, (50), 8 states have call predecessors, (50), 11 states have return successors, (47), 20 states have call predecessors, (47), 21 states have call successors, (47) Word has length 234 [2022-11-25 17:09:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:48,979 INFO L225 Difference]: With dead ends: 992 [2022-11-25 17:09:48,979 INFO L226 Difference]: Without dead ends: 990 [2022-11-25 17:09:48,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 422 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=560, Invalid=7049, Unknown=55, NotChecked=346, Total=8010 [2022-11-25 17:09:48,982 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 476 mSDsluCounter, 1353 mSDsCounter, 0 mSdLazyCounter, 8272 mSolverCounterSat, 352 mSolverCounterUnsat, 56 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 9349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 8272 IncrementalHoareTripleChecker+Invalid, 56 IncrementalHoareTripleChecker+Unknown, 669 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:48,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 1429 Invalid, 9349 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [352 Valid, 8272 Invalid, 56 Unknown, 669 Unchecked, 12.0s Time] [2022-11-25 17:09:48,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-11-25 17:09:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 888. [2022-11-25 17:09:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 597 states have (on average 1.1557788944723617) internal successors, (690), 616 states have internal predecessors, (690), 171 states have call successors, (171), 91 states have call predecessors, (171), 119 states have return successors, (224), 180 states have call predecessors, (224), 164 states have call successors, (224) [2022-11-25 17:09:49,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1085 transitions. [2022-11-25 17:09:49,089 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1085 transitions. Word has length 234 [2022-11-25 17:09:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:49,089 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1085 transitions. [2022-11-25 17:09:49,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 40 states have (on average 4.05) internal successors, (162), 39 states have internal predecessors, (162), 24 states have call successors, (50), 8 states have call predecessors, (50), 11 states have return successors, (47), 20 states have call predecessors, (47), 21 states have call successors, (47) [2022-11-25 17:09:49,090 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1085 transitions. [2022-11-25 17:09:49,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-25 17:09:49,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:49,093 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:49,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:49,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:49,318 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:49,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:49,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1844419160, now seen corresponding path program 1 times [2022-11-25 17:09:49,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:49,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931062408] [2022-11-25 17:09:49,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:49,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:49,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:09:49,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155665692] [2022-11-25 17:09:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:49,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:49,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:49,399 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:49,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:09:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:50,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 2989 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:09:50,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:50,339 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 10 treesize of output 4 [2022-11-25 17:09:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2022-11-25 17:09:50,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:09:50,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:50,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931062408] [2022-11-25 17:09:50,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:09:50,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155665692] [2022-11-25 17:09:50,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155665692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:09:50,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:09:50,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:09:50,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563420264] [2022-11-25 17:09:50,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:09:50,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:09:50,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:50,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:09:50,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:09:50,353 INFO L87 Difference]: Start difference. First operand 888 states and 1085 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-25 17:09:52,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:09:54,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:09:56,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:09:58,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:10:00,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:10:02,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:10:04,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:10:06,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:10:08,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:10:10,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:10:12,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:10:14,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:10:16,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:10:18,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:10:21,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:10:21,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:10:21,234 INFO L93 Difference]: Finished difference Result 1493 states and 1835 transitions. [2022-11-25 17:10:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:10:21,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 234 [2022-11-25 17:10:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:10:21,241 INFO L225 Difference]: With dead ends: 1493 [2022-11-25 17:10:21,241 INFO L226 Difference]: Without dead ends: 1182 [2022-11-25 17:10:21,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:10:21,244 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 134 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 6 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:10:21,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1092 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 287 Invalid, 15 Unknown, 0 Unchecked, 30.7s Time] [2022-11-25 17:10:21,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-11-25 17:10:21,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1165. [2022-11-25 17:10:21,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 789 states have (on average 1.1596958174904943) internal successors, (915), 815 states have internal predecessors, (915), 219 states have call successors, (219), 119 states have call predecessors, (219), 156 states have return successors, (279), 230 states have call predecessors, (279), 209 states have call successors, (279) [2022-11-25 17:10:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1413 transitions. [2022-11-25 17:10:21,400 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1413 transitions. Word has length 234 [2022-11-25 17:10:21,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:10:21,401 INFO L495 AbstractCegarLoop]: Abstraction has 1165 states and 1413 transitions. [2022-11-25 17:10:21,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2022-11-25 17:10:21,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1413 transitions. [2022-11-25 17:10:21,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-25 17:10:21,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:10:21,404 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:10:21,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-25 17:10:21,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 17:10:21,616 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:10:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:10:21,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1143354582, now seen corresponding path program 1 times [2022-11-25 17:10:21,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:10:21,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985584072] [2022-11-25 17:10:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:10:21,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:10:21,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:10:21,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404620386] [2022-11-25 17:10:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:10:21,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:10:21,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:10:21,682 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:10:21,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:10:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:22,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 2992 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-25 17:10:22,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:10:22,627 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 [2022-11-25 17:10:22,643 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 [2022-11-25 17:10:23,155 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 17:10:23,155 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 [2022-11-25 17:10:23,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-25 17:10:23,301 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3563 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_3563) |c_#memory_int|)) is different from true [2022-11-25 17:10:23,406 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3564 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_3564))) is different from true [2022-11-25 17:10:23,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:10:23,523 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:10:23,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 17:10:23,552 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-25 17:10:23,552 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 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:10:23,763 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 16 treesize of output 18 [2022-11-25 17:10:23,874 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 16 treesize of output 18 [2022-11-25 17:10:24,351 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 29 treesize of output 17 [2022-11-25 17:10:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 185 proven. 62 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-25 17:10:24,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:10:24,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:10:24,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985584072] [2022-11-25 17:10:24,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:10:24,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404620386] [2022-11-25 17:10:24,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404620386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:10:24,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:10:24,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-11-25 17:10:24,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152705119] [2022-11-25 17:10:24,911 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:10:24,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:10:24,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:10:24,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:10:24,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=872, Unknown=20, NotChecked=122, Total=1122 [2022-11-25 17:10:24,913 INFO L87 Difference]: Start difference. First operand 1165 states and 1413 transitions. Second operand has 27 states, 23 states have (on average 5.782608695652174) internal successors, (133), 24 states have internal predecessors, (133), 16 states have call successors, (38), 7 states have call predecessors, (38), 8 states have return successors, (36), 12 states have call predecessors, (36), 14 states have call successors, (36) [2022-11-25 17:10:26,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:10:29,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:10:34,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:10:34,881 INFO L93 Difference]: Finished difference Result 1436 states and 1750 transitions. [2022-11-25 17:10:34,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 17:10:34,882 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 5.782608695652174) internal successors, (133), 24 states have internal predecessors, (133), 16 states have call successors, (38), 7 states have call predecessors, (38), 8 states have return successors, (36), 12 states have call predecessors, (36), 14 states have call successors, (36) Word has length 234 [2022-11-25 17:10:34,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:10:34,889 INFO L225 Difference]: With dead ends: 1436 [2022-11-25 17:10:34,889 INFO L226 Difference]: Without dead ends: 1274 [2022-11-25 17:10:34,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 253 SyntacticMatches, 12 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=282, Invalid=2252, Unknown=24, NotChecked=198, Total=2756 [2022-11-25 17:10:34,892 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 234 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 3470 mSolverCounterSat, 158 mSolverCounterUnsat, 91 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 4442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 3470 IncrementalHoareTripleChecker+Invalid, 91 IncrementalHoareTripleChecker+Unknown, 723 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:10:34,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 830 Invalid, 4442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 3470 Invalid, 91 Unknown, 723 Unchecked, 9.1s Time] [2022-11-25 17:10:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2022-11-25 17:10:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1266. [2022-11-25 17:10:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 857 states have (on average 1.1575262543757292) internal successors, (992), 886 states have internal predecessors, (992), 239 states have call successors, (239), 128 states have call predecessors, (239), 169 states have return successors, (306), 251 states have call predecessors, (306), 228 states have call successors, (306) [2022-11-25 17:10:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1537 transitions. [2022-11-25 17:10:35,034 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1537 transitions. Word has length 234 [2022-11-25 17:10:35,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:10:35,035 INFO L495 AbstractCegarLoop]: Abstraction has 1266 states and 1537 transitions. [2022-11-25 17:10:35,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 5.782608695652174) internal successors, (133), 24 states have internal predecessors, (133), 16 states have call successors, (38), 7 states have call predecessors, (38), 8 states have return successors, (36), 12 states have call predecessors, (36), 14 states have call successors, (36) [2022-11-25 17:10:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1537 transitions. [2022-11-25 17:10:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-11-25 17:10:35,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:10:35,038 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:10:35,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:10:35,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 17:10:35,254 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:10:35,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:10:35,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1651458720, now seen corresponding path program 1 times [2022-11-25 17:10:35,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:10:35,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170030021] [2022-11-25 17:10:35,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:10:35,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:10:35,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:10:35,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297202474] [2022-11-25 17:10:35,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:10:35,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:10:35,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:10:35,319 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:10:35,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 17:10:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:36,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 3018 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:10:36,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:10:36,633 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 35 treesize of output 17 [2022-11-25 17:10:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 82 proven. 26 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2022-11-25 17:10:36,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:10:36,991 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 21 treesize of output 9 [2022-11-25 17:10:37,070 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 17:10:37,070 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 21 treesize of output 16 [2022-11-25 17:10:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2022-11-25 17:10:37,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:10:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170030021] [2022-11-25 17:10:37,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:10:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297202474] [2022-11-25 17:10:37,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297202474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:10:37,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:10:37,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2022-11-25 17:10:37,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178630696] [2022-11-25 17:10:37,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:10:37,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:10:37,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:10:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:10:37,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:10:37,295 INFO L87 Difference]: Start difference. First operand 1266 states and 1537 transitions. Second operand has 20 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 20 states have internal predecessors, (109), 7 states have call successors, (34), 4 states have call predecessors, (34), 8 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-11-25 17:10:40,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:10:40,149 INFO L93 Difference]: Finished difference Result 1906 states and 2354 transitions. [2022-11-25 17:10:40,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:10:40,150 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 20 states have internal predecessors, (109), 7 states have call successors, (34), 4 states have call predecessors, (34), 8 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) Word has length 238 [2022-11-25 17:10:40,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:10:40,158 INFO L225 Difference]: With dead ends: 1906 [2022-11-25 17:10:40,158 INFO L226 Difference]: Without dead ends: 1638 [2022-11-25 17:10:40,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 455 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 17:10:40,161 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 244 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 2076 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:10:40,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 2076 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1389 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-25 17:10:40,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2022-11-25 17:10:40,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1623. [2022-11-25 17:10:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1107 states have (on average 1.170731707317073) internal successors, (1296), 1142 states have internal predecessors, (1296), 297 states have call successors, (297), 161 states have call predecessors, (297), 218 states have return successors, (400), 319 states have call predecessors, (400), 282 states have call successors, (400) [2022-11-25 17:10:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 1993 transitions. [2022-11-25 17:10:40,373 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 1993 transitions. Word has length 238 [2022-11-25 17:10:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:10:40,373 INFO L495 AbstractCegarLoop]: Abstraction has 1623 states and 1993 transitions. [2022-11-25 17:10:40,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.7368421052631575) internal successors, (109), 20 states have internal predecessors, (109), 7 states have call successors, (34), 4 states have call predecessors, (34), 8 states have return successors, (34), 6 states have call predecessors, (34), 6 states have call successors, (34) [2022-11-25 17:10:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 1993 transitions. [2022-11-25 17:10:40,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-11-25 17:10:40,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:10:40,378 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:10:40,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 17:10:40,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 17:10:40,593 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:10:40,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:10:40,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1463271307, now seen corresponding path program 1 times [2022-11-25 17:10:40,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:10:40,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577766333] [2022-11-25 17:10:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:10:40,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:10:40,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:10:40,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841752673] [2022-11-25 17:10:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:10:40,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:10:40,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:10:40,673 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:10:40,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 17:10:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:41,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 3023 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-25 17:10:41,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:10:41,657 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 [2022-11-25 17:10:42,168 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-25 17:10:42,169 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 [2022-11-25 17:10:42,225 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 7 treesize of output 3 [2022-11-25 17:10:42,369 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3982 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_3982) |c_#memory_int|)) is different from true [2022-11-25 17:10:42,507 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3983 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |c_aws_add_size_checked_#in~r#1.offset| v_ArrVal_3983)))) is different from true [2022-11-25 17:10:43,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:10:43,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:10:43,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:10:43,619 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-25 17:10:43,620 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 2 case distinctions, treesize of input 24 treesize of output 38 [2022-11-25 17:10:43,642 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-25 17:10:43,642 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 [2022-11-25 17:10:43,655 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 8 treesize of output 7 [2022-11-25 17:10:43,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:10:43,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 20 [2022-11-25 17:10:43,861 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:10:43,861 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 [2022-11-25 17:10:43,869 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 [2022-11-25 17:10:43,938 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:10:43,938 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 20 treesize of output 26 [2022-11-25 17:10:43,947 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 [2022-11-25 17:10:44,505 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 29 treesize of output 17 [2022-11-25 17:10:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 170 proven. 60 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-25 17:10:44,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:10:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2022-11-25 17:10:45,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:10:45,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577766333] [2022-11-25 17:10:45,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:10:45,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841752673] [2022-11-25 17:10:45,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841752673] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:10:45,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:10:45,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [34] total 39 [2022-11-25 17:10:45,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30398332] [2022-11-25 17:10:45,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:10:45,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:10:45,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:10:45,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:10:45,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1196, Unknown=5, NotChecked=142, Total=1482 [2022-11-25 17:10:45,514 INFO L87 Difference]: Start difference. First operand 1623 states and 1993 transitions. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-25 17:10:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:10:46,261 INFO L93 Difference]: Finished difference Result 2426 states and 3033 transitions. [2022-11-25 17:10:46,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:10:46,262 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 241 [2022-11-25 17:10:46,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:10:46,271 INFO L225 Difference]: With dead ends: 2426 [2022-11-25 17:10:46,271 INFO L226 Difference]: Without dead ends: 1785 [2022-11-25 17:10:46,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 440 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=165, Invalid=1398, Unknown=5, NotChecked=154, Total=1722 [2022-11-25 17:10:46,276 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 65 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:10:46,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 991 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:10:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2022-11-25 17:10:46,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1688. [2022-11-25 17:10:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1152 states have (on average 1.1753472222222223) internal successors, (1354), 1189 states have internal predecessors, (1354), 310 states have call successors, (310), 163 states have call predecessors, (310), 225 states have return successors, (433), 335 states have call predecessors, (433), 295 states have call successors, (433) [2022-11-25 17:10:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 2097 transitions. [2022-11-25 17:10:46,537 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 2097 transitions. Word has length 241 [2022-11-25 17:10:46,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:10:46,538 INFO L495 AbstractCegarLoop]: Abstraction has 1688 states and 2097 transitions. [2022-11-25 17:10:46,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-25 17:10:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 2097 transitions. [2022-11-25 17:10:46,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-11-25 17:10:46,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:10:46,541 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:10:46,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 17:10:46,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 17:10:46,755 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:10:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:10:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash 170191179, now seen corresponding path program 1 times [2022-11-25 17:10:46,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:10:46,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252477003] [2022-11-25 17:10:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:10:46,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:10:46,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:10:46,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115154676] [2022-11-25 17:10:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:10:46,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:10:46,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:10:46,821 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:10:46,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 17:10:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:47,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 3029 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-25 17:10:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:10:47,817 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 [2022-11-25 17:10:47,822 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 [2022-11-25 17:10:48,282 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-25 17:10:48,282 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 20 treesize of output 22 [2022-11-25 17:10:48,322 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 7 treesize of output 3 [2022-11-25 17:10:48,400 WARN L859 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_4218 Int)) (= (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_4218)) |c_#memory_int|)) is different from true [2022-11-25 17:10:48,496 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4219 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_4219) |c_#memory_int|)) is different from true [2022-11-25 17:10:48,508 WARN L859 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_4218 Int) (v_ArrVal_4219 (Array Int Int))) (= |c_#memory_int| (store (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_4218)) |c_hash_table_state_required_bytes_#in~required_bytes.base| v_ArrVal_4219))) is different from true [2022-11-25 17:10:48,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:10:48,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-11-25 17:10:48,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:10:48,748 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 16 treesize of output 18 [2022-11-25 17:10:48,853 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 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:10:49,348 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-25 17:10:49,349 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 22 treesize of output 10 [2022-11-25 17:10:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 219 proven. 44 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-11-25 17:10:49,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:10:49,733 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4221 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base| v_ArrVal_4221) |c_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.base|) (+ 40 |c_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.offset|)) ~aws_hash_iter_status~0~AWS_HASH_ITER_STATUS_DELETE_CALLED))) is different from false [2022-11-25 17:10:49,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:10:49,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252477003] [2022-11-25 17:10:49,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:10:49,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115154676] [2022-11-25 17:10:49,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115154676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:10:49,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:10:49,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-11-25 17:10:49,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598305113] [2022-11-25 17:10:49,741 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:10:49,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:10:49,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:10:49,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:10:49,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1009, Unknown=4, NotChecked=268, Total=1406 [2022-11-25 17:10:49,743 INFO L87 Difference]: Start difference. First operand 1688 states and 2097 transitions. Second operand has 30 states, 27 states have (on average 5.2592592592592595) internal successors, (142), 27 states have internal predecessors, (142), 17 states have call successors, (38), 7 states have call predecessors, (38), 10 states have return successors, (36), 14 states have call predecessors, (36), 16 states have call successors, (36) [2022-11-25 17:10:50,912 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_4218 Int)) (= (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_4218)) |c_#memory_int|)) (exists ((|v_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.base_BEFORE_CALL_62| Int)) (= (select |c_#valid| |v_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.base_BEFORE_CALL_62|) 1))) is different from true [2022-11-25 17:10:51,598 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.base_BEFORE_CALL_62| Int)) (= (select |c_#valid| |v_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.base_BEFORE_CALL_62|) 1)) (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_4218 Int) (v_ArrVal_4219 (Array Int Int))) (= |c_#memory_int| (store (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_4218)) |c_hash_table_state_required_bytes_#in~required_bytes.base| v_ArrVal_4219)))) is different from true [2022-11-25 17:11:00,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:00,258 INFO L93 Difference]: Finished difference Result 2677 states and 3317 transitions. [2022-11-25 17:11:00,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 17:11:00,258 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 5.2592592592592595) internal successors, (142), 27 states have internal predecessors, (142), 17 states have call successors, (38), 7 states have call predecessors, (38), 10 states have return successors, (36), 14 states have call predecessors, (36), 16 states have call successors, (36) Word has length 241 [2022-11-25 17:11:00,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:00,268 INFO L225 Difference]: With dead ends: 2677 [2022-11-25 17:11:00,268 INFO L226 Difference]: Without dead ends: 2104 [2022-11-25 17:11:00,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 265 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=363, Invalid=3164, Unknown=37, NotChecked=726, Total=4290 [2022-11-25 17:11:00,273 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 298 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 5419 mSolverCounterSat, 178 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 6753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 5419 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 1139 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:00,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 1167 Invalid, 6753 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [178 Valid, 5419 Invalid, 17 Unknown, 1139 Unchecked, 8.9s Time] [2022-11-25 17:11:00,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2022-11-25 17:11:00,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2068. [2022-11-25 17:11:00,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 1409 states have (on average 1.177430801987225) internal successors, (1659), 1461 states have internal predecessors, (1659), 377 states have call successors, (377), 197 states have call predecessors, (377), 281 states have return successors, (529), 409 states have call predecessors, (529), 357 states have call successors, (529) [2022-11-25 17:11:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 2565 transitions. [2022-11-25 17:11:00,535 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 2565 transitions. Word has length 241 [2022-11-25 17:11:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:00,535 INFO L495 AbstractCegarLoop]: Abstraction has 2068 states and 2565 transitions. [2022-11-25 17:11:00,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 5.2592592592592595) internal successors, (142), 27 states have internal predecessors, (142), 17 states have call successors, (38), 7 states have call predecessors, (38), 10 states have return successors, (36), 14 states have call predecessors, (36), 16 states have call successors, (36) [2022-11-25 17:11:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 2565 transitions. [2022-11-25 17:11:00,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-11-25 17:11:00,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:00,540 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:00,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:00,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 17:11:00,755 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:00,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:00,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2078117101, now seen corresponding path program 1 times [2022-11-25 17:11:00,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:00,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858448967] [2022-11-25 17:11:00,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:00,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:00,824 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:11:00,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61900492] [2022-11-25 17:11:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:00,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:00,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:00,826 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:00,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 17:11:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:01,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 2962 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:11:01,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-25 17:11:01,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:11:01,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:01,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858448967] [2022-11-25 17:11:01,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:11:01,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61900492] [2022-11-25 17:11:01,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61900492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:01,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:01,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:11:01,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421288231] [2022-11-25 17:11:01,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:01,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:11:01,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:01,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:11:01,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:11:01,748 INFO L87 Difference]: Start difference. First operand 2068 states and 2565 transitions. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (34), 2 states have call predecessors, (34), 4 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-25 17:11:01,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:01,971 INFO L93 Difference]: Finished difference Result 3394 states and 4189 transitions. [2022-11-25 17:11:01,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:11:01,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (34), 2 states have call predecessors, (34), 4 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) Word has length 236 [2022-11-25 17:11:01,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:01,978 INFO L225 Difference]: With dead ends: 3394 [2022-11-25 17:11:01,978 INFO L226 Difference]: Without dead ends: 1323 [2022-11-25 17:11:01,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:11:01,990 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 2 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:01,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1136 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:11:01,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2022-11-25 17:11:02,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1296. [2022-11-25 17:11:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 885 states have (on average 1.1717514124293786) internal successors, (1037), 918 states have internal predecessors, (1037), 234 states have call successors, (234), 125 states have call predecessors, (234), 176 states have return successors, (318), 252 states have call predecessors, (318), 221 states have call successors, (318) [2022-11-25 17:11:02,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1589 transitions. [2022-11-25 17:11:02,157 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1589 transitions. Word has length 236 [2022-11-25 17:11:02,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:02,158 INFO L495 AbstractCegarLoop]: Abstraction has 1296 states and 1589 transitions. [2022-11-25 17:11:02,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 6 states have internal predecessors, (118), 2 states have call successors, (34), 2 states have call predecessors, (34), 4 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-25 17:11:02,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1589 transitions. [2022-11-25 17:11:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-25 17:11:02,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:02,161 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:02,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:02,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 17:11:02,380 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:02,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:02,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1748688058, now seen corresponding path program 1 times [2022-11-25 17:11:02,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:02,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848836674] [2022-11-25 17:11:02,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:02,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:02,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:11:02,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296012556] [2022-11-25 17:11:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:02,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:02,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:02,439 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:02,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 17:11:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:03,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-25 17:11:03,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:03,464 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 [2022-11-25 17:11:03,897 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-25 17:11:03,897 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 29 treesize of output 34 [2022-11-25 17:11:03,930 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 7 treesize of output 3 [2022-11-25 17:11:04,045 WARN L859 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_4556 (Array Int Int))) (= (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_4556) |c_#memory_int|)) is different from true [2022-11-25 17:11:04,130 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4557 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_4557))) is different from true [2022-11-25 17:11:04,140 WARN L859 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_4556 (Array Int Int)) (v_ArrVal_4557 (Array Int Int))) (= (store (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_4556) |c_hash_table_state_required_bytes_#in~required_bytes.base| v_ArrVal_4557) |c_#memory_int|)) is different from true [2022-11-25 17:11:04,178 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 17:11:04,178 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 2 case distinctions, treesize of input 19 treesize of output 31 [2022-11-25 17:11:04,187 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 [2022-11-25 17:11:04,517 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 29 treesize of output 17 [2022-11-25 17:11:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 146 proven. 47 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-25 17:11:04,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-11-25 17:11:05,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:05,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848836674] [2022-11-25 17:11:05,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:11:05,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296012556] [2022-11-25 17:11:05,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296012556] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:05,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:11:05,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [28] total 37 [2022-11-25 17:11:05,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848860360] [2022-11-25 17:11:05,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:05,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:11:05,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:05,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:11:05,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1017, Unknown=4, NotChecked=198, Total=1332 [2022-11-25 17:11:05,480 INFO L87 Difference]: Start difference. First operand 1296 states and 1589 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 10 states have internal predecessors, (93), 5 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 5 states have call successors, (27) [2022-11-25 17:11:06,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:06,396 INFO L93 Difference]: Finished difference Result 1533 states and 1857 transitions. [2022-11-25 17:11:06,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:11:06,397 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 10 states have internal predecessors, (93), 5 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 5 states have call successors, (27) Word has length 235 [2022-11-25 17:11:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:06,402 INFO L225 Difference]: With dead ends: 1533 [2022-11-25 17:11:06,402 INFO L226 Difference]: Without dead ends: 922 [2022-11-25 17:11:06,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 431 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=1207, Unknown=4, NotChecked=216, Total=1560 [2022-11-25 17:11:06,405 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 51 mSDsluCounter, 1513 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:06,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1696 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:11:06,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-11-25 17:11:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 776. [2022-11-25 17:11:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 540 states have (on average 1.135185185185185) internal successors, (613), 553 states have internal predecessors, (613), 129 states have call successors, (129), 85 states have call predecessors, (129), 106 states have return successors, (167), 137 states have call predecessors, (167), 124 states have call successors, (167) [2022-11-25 17:11:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 909 transitions. [2022-11-25 17:11:06,516 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 909 transitions. Word has length 235 [2022-11-25 17:11:06,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:06,517 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 909 transitions. [2022-11-25 17:11:06,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 10 states have internal predecessors, (93), 5 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 5 states have call successors, (27) [2022-11-25 17:11:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 909 transitions. [2022-11-25 17:11:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-25 17:11:06,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:06,519 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:06,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:06,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:06,733 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:06,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:06,734 INFO L85 PathProgramCache]: Analyzing trace with hash 455607930, now seen corresponding path program 1 times [2022-11-25 17:11:06,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:06,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747164795] [2022-11-25 17:11:06,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:06,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:06,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:11:06,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675508705] [2022-11-25 17:11:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:06,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:06,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:06,849 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:06,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 17:11:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:07,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 2996 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-25 17:11:07,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:07,937 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 [2022-11-25 17:11:08,558 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 17:11:08,559 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 [2022-11-25 17:11:08,769 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4754 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_4754) |c_#memory_int|)) is different from true [2022-11-25 17:11:08,892 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4755 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_4755) |c_#memory_int|)) is different from true [2022-11-25 17:11:09,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:11:09,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:11:09,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-25 17:11:09,028 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-25 17:11:09,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-11-25 17:11:10,524 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:11:10,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 31 treesize of output 15 [2022-11-25 17:11:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 164 proven. 80 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-25 17:11:10,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:11,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:11,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747164795] [2022-11-25 17:11:11,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:11:11,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675508705] [2022-11-25 17:11:11,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675508705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:11,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:11:11,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-11-25 17:11:11,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107461300] [2022-11-25 17:11:11,890 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:11,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 17:11:11,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:11,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 17:11:11,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1569, Unknown=22, NotChecked=162, Total=1892 [2022-11-25 17:11:11,892 INFO L87 Difference]: Start difference. First operand 776 states and 909 transitions. Second operand has 34 states, 31 states have (on average 4.67741935483871) internal successors, (145), 29 states have internal predecessors, (145), 17 states have call successors, (37), 9 states have call predecessors, (37), 11 states have return successors, (35), 15 states have call predecessors, (35), 16 states have call successors, (35) [2022-11-25 17:11:13,670 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.base_BEFORE_CALL_75| Int)) (= (select |c_#valid| |v_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.base_BEFORE_CALL_75|) 1)) (exists ((v_ArrVal_4755 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_4755) |c_#memory_int|))) is different from true [2022-11-25 17:11:23,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:23,479 INFO L93 Difference]: Finished difference Result 959 states and 1124 transitions. [2022-11-25 17:11:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 17:11:23,480 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 4.67741935483871) internal successors, (145), 29 states have internal predecessors, (145), 17 states have call successors, (37), 9 states have call predecessors, (37), 11 states have return successors, (35), 15 states have call predecessors, (35), 16 states have call successors, (35) Word has length 235 [2022-11-25 17:11:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:23,484 INFO L225 Difference]: With dead ends: 959 [2022-11-25 17:11:23,484 INFO L226 Difference]: Without dead ends: 957 [2022-11-25 17:11:23,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 255 SyntacticMatches, 11 SemanticMatches, 80 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=505, Invalid=5613, Unknown=56, NotChecked=468, Total=6642 [2022-11-25 17:11:23,488 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 238 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 6146 mSolverCounterSat, 147 mSolverCounterUnsat, 70 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 7141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 6146 IncrementalHoareTripleChecker+Invalid, 70 IncrementalHoareTripleChecker+Unknown, 778 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:23,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1116 Invalid, 7141 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [147 Valid, 6146 Invalid, 70 Unknown, 778 Unchecked, 8.8s Time] [2022-11-25 17:11:23,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-11-25 17:11:23,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 931. [2022-11-25 17:11:23,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 650 states have (on average 1.136923076923077) internal successors, (739), 665 states have internal predecessors, (739), 154 states have call successors, (154), 101 states have call predecessors, (154), 126 states have return successors, (199), 164 states have call predecessors, (199), 148 states have call successors, (199) [2022-11-25 17:11:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1092 transitions. [2022-11-25 17:11:23,648 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1092 transitions. Word has length 235 [2022-11-25 17:11:23,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:23,648 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1092 transitions. [2022-11-25 17:11:23,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 4.67741935483871) internal successors, (145), 29 states have internal predecessors, (145), 17 states have call successors, (37), 9 states have call predecessors, (37), 11 states have return successors, (35), 15 states have call predecessors, (35), 16 states have call successors, (35) [2022-11-25 17:11:23,648 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1092 transitions. [2022-11-25 17:11:23,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-25 17:11:23,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:23,650 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:23,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:23,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:23,866 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:23,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:23,866 INFO L85 PathProgramCache]: Analyzing trace with hash -167673672, now seen corresponding path program 1 times [2022-11-25 17:11:23,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:23,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015019903] [2022-11-25 17:11:23,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:23,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:23,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:11:23,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303866571] [2022-11-25 17:11:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:23,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:23,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:23,935 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:23,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 17:11:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:24,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 2983 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:11:24,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:24,982 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 184 proven. 9 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-25 17:11:24,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-25 17:11:25,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:25,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015019903] [2022-11-25 17:11:25,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:11:25,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303866571] [2022-11-25 17:11:25,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303866571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:11:25,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:11:25,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-11-25 17:11:25,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170275367] [2022-11-25 17:11:25,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:25,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:11:25,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:25,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:11:25,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:11:25,360 INFO L87 Difference]: Start difference. First operand 931 states and 1092 transitions. Second operand has 14 states, 12 states have (on average 11.75) internal successors, (141), 11 states have internal predecessors, (141), 5 states have call successors, (44), 3 states have call predecessors, (44), 6 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) [2022-11-25 17:11:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:25,676 INFO L93 Difference]: Finished difference Result 1296 states and 1526 transitions. [2022-11-25 17:11:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:11:25,677 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 11.75) internal successors, (141), 11 states have internal predecessors, (141), 5 states have call successors, (44), 3 states have call predecessors, (44), 6 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) Word has length 235 [2022-11-25 17:11:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:25,680 INFO L225 Difference]: With dead ends: 1296 [2022-11-25 17:11:25,680 INFO L226 Difference]: Without dead ends: 797 [2022-11-25 17:11:25,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:11:25,682 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 4 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1697 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:25,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1697 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:11:25,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-25 17:11:25,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 774. [2022-11-25 17:11:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 539 states have (on average 1.1335807050092765) internal successors, (611), 550 states have internal predecessors, (611), 129 states have call successors, (129), 86 states have call predecessors, (129), 105 states have return successors, (161), 137 states have call predecessors, (161), 124 states have call successors, (161) [2022-11-25 17:11:25,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 901 transitions. [2022-11-25 17:11:25,825 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 901 transitions. Word has length 235 [2022-11-25 17:11:25,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:25,826 INFO L495 AbstractCegarLoop]: Abstraction has 774 states and 901 transitions. [2022-11-25 17:11:25,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 11.75) internal successors, (141), 11 states have internal predecessors, (141), 5 states have call successors, (44), 3 states have call predecessors, (44), 6 states have return successors, (43), 5 states have call predecessors, (43), 5 states have call successors, (43) [2022-11-25 17:11:25,826 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 901 transitions. [2022-11-25 17:11:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-25 17:11:25,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:25,829 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:25,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:26,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-25 17:11:26,042 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:26,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:26,043 INFO L85 PathProgramCache]: Analyzing trace with hash -530549555, now seen corresponding path program 1 times [2022-11-25 17:11:26,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:26,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900621329] [2022-11-25 17:11:26,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:26,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:26,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:11:26,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430865046] [2022-11-25 17:11:26,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:26,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:26,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:26,104 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:26,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 17:11:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:27,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 2975 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-25 17:11:27,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:27,186 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 [2022-11-25 17:11:27,188 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 [2022-11-25 17:11:27,193 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 [2022-11-25 17:11:29,966 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 17:11:29,967 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 [2022-11-25 17:11:30,061 WARN L859 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int)) (and (exists ((v_ArrVal_5123 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_5123))) (exists ((v_ArrVal_5124 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_5124))))) is different from true [2022-11-25 17:11:30,202 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_5126 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_5126))) (exists ((v_ArrVal_5125 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_5125)))) is different from true [2022-11-25 17:11:30,234 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5123 (Array Int Int)) (v_ArrVal_5125 (Array Int Int)) (|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_5124 (Array Int Int)) (v_ArrVal_5126 (Array Int Int))) (and (= (store (store |c_old(#memory_$Pointer$.offset)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_5124) |c_hash_table_state_required_bytes_#in~required_bytes.base| v_ArrVal_5125) |c_#memory_$Pointer$.offset|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_5123) |c_hash_table_state_required_bytes_#in~required_bytes.base| v_ArrVal_5126)))) is different from true [2022-11-25 17:11:30,335 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 17:11:30,336 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 2 case distinctions, treesize of input 18 treesize of output 30 [2022-11-25 17:11:30,381 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 17:11:30,381 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 2 case distinctions, treesize of input 17 treesize of output 29 [2022-11-25 17:11:30,400 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 [2022-11-25 17:11:30,403 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 6 treesize of output 4 [2022-11-25 17:11:32,591 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_hash_iter_is_valid_#in~iter.offset_BEFORE_CALL_25| Int) (|v_aws_hash_iter_is_valid_#in~iter.base_BEFORE_CALL_25| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_hash_iter_is_valid_#in~iter.base_BEFORE_CALL_25|) |v_aws_hash_iter_is_valid_#in~iter.offset_BEFORE_CALL_25|) 0))) (exists ((|v_aws_hash_iter_is_valid_#in~iter.offset_BEFORE_CALL_25| Int) (|v_aws_hash_iter_is_valid_#in~iter.base_BEFORE_CALL_25| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_hash_iter_is_valid_#in~iter.base_BEFORE_CALL_25|) |v_aws_hash_iter_is_valid_#in~iter.offset_BEFORE_CALL_25|) 0)))) is different from true [2022-11-25 17:11:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 162 proven. 40 refuted. 0 times theorem prover too weak. 77 trivial. 18 not checked. [2022-11-25 17:11:43,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-11-25 17:11:44,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:44,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900621329] [2022-11-25 17:11:44,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:11:44,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430865046] [2022-11-25 17:11:44,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430865046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:11:44,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:11:44,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 9] total 38 [2022-11-25 17:11:44,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050848338] [2022-11-25 17:11:44,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:44,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 17:11:44,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:44,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 17:11:44,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=996, Unknown=7, NotChecked=268, Total=1406 [2022-11-25 17:11:44,766 INFO L87 Difference]: Start difference. First operand 774 states and 901 transitions. Second operand has 38 states, 34 states have (on average 5.176470588235294) internal successors, (176), 36 states have internal predecessors, (176), 18 states have call successors, (62), 9 states have call predecessors, (62), 13 states have return successors, (59), 16 states have call predecessors, (59), 17 states have call successors, (59) [2022-11-25 17:11:47,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:11:49,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:11:51,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:11:53,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:11:55,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:11:57,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:00,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:02,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:04,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:06,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:08,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:10,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:12,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:14,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:16,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:18,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:21,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:23,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:25,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:29,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:31,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:33,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:35,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:39,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:51,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:12:53,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:12:55,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:13:21,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:13:23,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:13:25,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:13:26,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:26,445 INFO L93 Difference]: Finished difference Result 1196 states and 1451 transitions. [2022-11-25 17:13:26,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-25 17:13:26,446 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 5.176470588235294) internal successors, (176), 36 states have internal predecessors, (176), 18 states have call successors, (62), 9 states have call predecessors, (62), 13 states have return successors, (59), 16 states have call predecessors, (59), 17 states have call successors, (59) Word has length 239 [2022-11-25 17:13:26,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:26,449 INFO L225 Difference]: With dead ends: 1196 [2022-11-25 17:13:26,449 INFO L226 Difference]: Without dead ends: 894 [2022-11-25 17:13:26,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 435 SyntacticMatches, 13 SemanticMatches, 66 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 49.3s TimeCoverageRelationStatistics Valid=449, Invalid=3574, Unknown=25, NotChecked=508, Total=4556 [2022-11-25 17:13:26,452 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 279 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 4972 mSolverCounterSat, 177 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 6350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 4972 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 1169 IncrementalHoareTripleChecker+Unchecked, 67.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:26,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1121 Invalid, 6350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 4972 Invalid, 32 Unknown, 1169 Unchecked, 67.9s Time] [2022-11-25 17:13:26,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-11-25 17:13:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 786. [2022-11-25 17:13:26,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 548 states have (on average 1.1240875912408759) internal successors, (616), 559 states have internal predecessors, (616), 129 states have call successors, (129), 89 states have call predecessors, (129), 108 states have return successors, (161), 137 states have call predecessors, (161), 124 states have call successors, (161) [2022-11-25 17:13:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 906 transitions. [2022-11-25 17:13:26,584 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 906 transitions. Word has length 239 [2022-11-25 17:13:26,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:26,584 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 906 transitions. [2022-11-25 17:13:26,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 5.176470588235294) internal successors, (176), 36 states have internal predecessors, (176), 18 states have call successors, (62), 9 states have call predecessors, (62), 13 states have return successors, (59), 16 states have call predecessors, (59), 17 states have call successors, (59) [2022-11-25 17:13:26,585 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 906 transitions. [2022-11-25 17:13:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-25 17:13:26,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:26,587 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:26,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:26,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:26,802 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 41145192, now seen corresponding path program 1 times [2022-11-25 17:13:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:26,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294822357] [2022-11-25 17:13:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:26,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:26,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:13:26,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546638916] [2022-11-25 17:13:26,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:26,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:26,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:26,889 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:26,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 17:13:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:28,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 3041 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-25 17:13:28,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:28,199 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 [2022-11-25 17:13:28,933 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 17:13:28,933 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 [2022-11-25 17:13:29,130 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5373 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5373) |c_#memory_int|)) is different from true [2022-11-25 17:13:29,258 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5374 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_5374))) is different from true [2022-11-25 17:13:29,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:13:29,371 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:13:29,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 35 [2022-11-25 17:13:29,400 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-25 17:13:29,400 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 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 17:13:29,728 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 26 treesize of output 26 [2022-11-25 17:13:29,938 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 26 treesize of output 26 [2022-11-25 17:13:31,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:13:31,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 31 treesize of output 15 [2022-11-25 17:13:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 185 proven. 91 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-25 17:13:31,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:13:32,664 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5376 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_save_byte_from_array_~storage#1.base| v_ArrVal_5376) |c_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.base|))) (or (not (= (mod (select .cse0 (+ 32 |c_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.offset|)) 18446744073709551616) (mod (select .cse0 (+ |c_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.offset| 24)) 18446744073709551616))) (= ~aws_hash_iter_status~0~AWS_HASH_ITER_STATUS_DONE (select .cse0 (+ 40 |c_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.offset|)))))) is different from false [2022-11-25 17:13:32,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:13:32,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294822357] [2022-11-25 17:13:32,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:13:32,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546638916] [2022-11-25 17:13:32,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546638916] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:13:32,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:13:32,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-11-25 17:13:32,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347150898] [2022-11-25 17:13:32,678 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:13:32,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 17:13:32,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:13:32,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 17:13:32,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1648, Unknown=21, NotChecked=252, Total=2070 [2022-11-25 17:13:32,681 INFO L87 Difference]: Start difference. First operand 786 states and 906 transitions. Second operand has 36 states, 33 states have (on average 4.454545454545454) internal successors, (147), 31 states have internal predecessors, (147), 19 states have call successors, (38), 9 states have call predecessors, (38), 11 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) [2022-11-25 17:13:34,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:13:36,387 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.base_BEFORE_CALL_88| Int)) (= 1 (select |c_#valid| |v_ULTIMATE.start_aws_hash_iter_done_harness_~#iter~2#1.base_BEFORE_CALL_88|))) (exists ((v_ArrVal_5373 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_5373) |c_#memory_int|))) is different from true [2022-11-25 17:13:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:13:50,118 INFO L93 Difference]: Finished difference Result 813 states and 933 transitions. [2022-11-25 17:13:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-25 17:13:50,119 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 4.454545454545454) internal successors, (147), 31 states have internal predecessors, (147), 19 states have call successors, (38), 9 states have call predecessors, (38), 11 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) Word has length 242 [2022-11-25 17:13:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:13:50,121 INFO L225 Difference]: With dead ends: 813 [2022-11-25 17:13:50,121 INFO L226 Difference]: Without dead ends: 811 [2022-11-25 17:13:50,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 251 SyntacticMatches, 13 SemanticMatches, 81 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=515, Invalid=5633, Unknown=30, NotChecked=628, Total=6806 [2022-11-25 17:13:50,123 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 375 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 7010 mSolverCounterSat, 265 mSolverCounterUnsat, 74 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 8153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 7010 IncrementalHoareTripleChecker+Invalid, 74 IncrementalHoareTripleChecker+Unknown, 804 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:13:50,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 1142 Invalid, 8153 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [265 Valid, 7010 Invalid, 74 Unknown, 804 Unchecked, 14.6s Time] [2022-11-25 17:13:50,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-11-25 17:13:50,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 790. [2022-11-25 17:13:50,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 551 states have (on average 1.1234119782214156) internal successors, (619), 562 states have internal predecessors, (619), 129 states have call successors, (129), 90 states have call predecessors, (129), 109 states have return successors, (161), 137 states have call predecessors, (161), 124 states have call successors, (161) [2022-11-25 17:13:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 909 transitions. [2022-11-25 17:13:50,267 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 909 transitions. Word has length 242 [2022-11-25 17:13:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:13:50,267 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 909 transitions. [2022-11-25 17:13:50,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 4.454545454545454) internal successors, (147), 31 states have internal predecessors, (147), 19 states have call successors, (38), 9 states have call predecessors, (38), 11 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) [2022-11-25 17:13:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 909 transitions. [2022-11-25 17:13:50,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-25 17:13:50,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:13:50,270 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:13:50,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 17:13:50,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-25 17:13:50,486 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:13:50,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:13:50,486 INFO L85 PathProgramCache]: Analyzing trace with hash -449178412, now seen corresponding path program 1 times [2022-11-25 17:13:50,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:13:50,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350215975] [2022-11-25 17:13:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:50,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:13:50,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:13:50,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259573494] [2022-11-25 17:13:50,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:13:50,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:13:50,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:13:50,557 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:13:50,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c0df254-2ad1-4cb0-844c-23062b8147f9/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 17:13:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:13:51,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 3002 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-25 17:13:51,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:13:53,813 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_1| Int) (|v_aws_hash_table_is_valid_#in~map.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_1|) |v_aws_hash_table_is_valid_#in~map.offset_BEFORE_CALL_1|) 0))) (exists ((|v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_1| Int) (|v_aws_hash_table_is_valid_#in~map.offset_BEFORE_CALL_1| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_hash_table_is_valid_#in~map.base_BEFORE_CALL_1|) |v_aws_hash_table_is_valid_#in~map.offset_BEFORE_CALL_1|) 0)))) is different from true [2022-11-25 17:13:55,989 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_71 Int) (v_aws_hash_iter_done_~iter.base_BEFORE_CALL_69 Int)) (not (= 0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_69) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_71)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_69) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_71))))) (exists ((v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_71 Int) (v_aws_hash_iter_done_~iter.base_BEFORE_CALL_69 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_69) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_71)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_69) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_71)) 0)))) is different from true [2022-11-25 17:13:58,082 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_70 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_72 Int)) (not (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_70) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_72)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_70) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_72)) 0))) (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_70 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_72 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_70) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_72)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_70) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_72)) 0)))) is different from true [2022-11-25 17:14:20,400 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:14:22,481 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_72 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_74 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_72) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_74)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_72) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_74)) 0))) (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_72 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_74 Int)) (not (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_72) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_74)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_72) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_74)) 0)))) is different from true [2022-11-25 17:14:24,573 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_73 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_75 Int)) (not (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_73) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_75)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_73) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_75)) 0))) (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_73 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_75 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_73) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_75)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_73) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_75)) 0)))) is different from true [2022-11-25 17:14:36,676 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:14:48,805 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:15:00,936 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:15:13,953 WARN L233 SmtUtils]: Spent 10.08s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:15:26,572 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:15:34,785 WARN L233 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:15:44,933 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:15:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 142 proven. 6 refuted. 0 times theorem prover too weak. 166 trivial. 8 not checked. [2022-11-25 17:15:44,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:16:05,522 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:16:17,824 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:16:36,080 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:16:48,251 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:16:55,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:55,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350215975] [2022-11-25 17:16:55,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:16:55,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259573494] [2022-11-25 17:16:55,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259573494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:16:55,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:16:55,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-11-25 17:16:55,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945058528] [2022-11-25 17:16:55,039 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:16:55,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:16:55,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:55,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:16:55,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=593, Unknown=28, NotChecked=270, Total=992 [2022-11-25 17:16:55,040 INFO L87 Difference]: Start difference. First operand 790 states and 909 transitions. Second operand has 23 states, 21 states have (on average 5.523809523809524) internal successors, (116), 22 states have internal predecessors, (116), 7 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (32), 7 states have call predecessors, (32), 6 states have call successors, (32) [2022-11-25 17:16:57,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:16:59,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:17:01,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:03,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:05,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:07,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:09,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:11,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:19,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:21,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:33,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:35,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:37,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:48,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:50,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:52,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:54,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:56,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:17:58,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:00,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:02,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:04,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:06,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:08,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:10,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:12,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:14,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-25 17:18:16,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:18,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:18:20,711 WARN L859 $PredicateComparison]: unable to prove that (and (or (exists ((v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_71 Int) (v_aws_hash_iter_done_~iter.base_BEFORE_CALL_69 Int)) (not (= 0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_69) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_71)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_69) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_71))))) (exists ((v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_71 Int) (v_aws_hash_iter_done_~iter.base_BEFORE_CALL_69 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_69) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_71)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_69) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_71)) 0)))) (or (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73 Int)) (not (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73)) 0))) (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73)) 0))))) is different from true [2022-11-25 17:18:22,760 WARN L859 $PredicateComparison]: unable to prove that (and (or (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_70 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_72 Int)) (not (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_70) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_72)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_70) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_72)) 0))) (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_70 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_72 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_70) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_72)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_70) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_72)) 0)))) (or (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73 Int)) (not (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73)) 0))) (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73)) 0))))) is different from true [2022-11-25 17:18:24,922 WARN L859 $PredicateComparison]: unable to prove that (and (or (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73 Int)) (not (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73)) 0))) (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_71) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_73)) 0)))) (or (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_72 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_74 Int)) (not (= (select (select |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_72) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_74)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_72) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_74)) 0))) (exists ((v_aws_hash_iter_done_~iter.base_BEFORE_CALL_72 Int) (v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_74 Int)) (not (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_72) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_74)) (select (select |c_#memory_$Pointer$.offset| v_aws_hash_iter_done_~iter.base_BEFORE_CALL_72) v_aws_hash_iter_done_~iter.offset_BEFORE_CALL_74)) 0))))) is different from true [2022-11-25 17:18:49,306 WARN L233 SmtUtils]: Spent 22.07s on a formula simplification. DAG size of input: 49 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:18:59,479 WARN L233 SmtUtils]: Spent 8.11s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:19:21,641 WARN L233 SmtUtils]: Spent 20.10s on a formula simplification. DAG size of input: 41 DAG size of output: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)