./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 11:53:25,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:53:25,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:53:25,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:53:25,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:53:25,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:53:25,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:53:25,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:53:25,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:53:25,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:53:25,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:53:25,616 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:53:25,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:53:25,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:53:25,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:53:25,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:53:25,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:53:25,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:53:25,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:53:25,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:53:25,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:53:25,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:53:25,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:53:25,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:53:25,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:53:25,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:53:25,628 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:53:25,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:53:25,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:53:25,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:53:25,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:53:25,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:53:25,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:53:25,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:53:25,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:53:25,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:53:25,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:53:25,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:53:25,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:53:25,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:53:25,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:53:25,635 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-12-13 11:53:25,652 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:53:25,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:53:25,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:53:25,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:53:25,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:53:25,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:53:25,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:53:25,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:53:25,654 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:53:25,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:53:25,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:53:25,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:53:25,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:53:25,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:53:25,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:53:25,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:53:25,655 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:53:25,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:53:25,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:53:25,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:53:25,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:53:25,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:53:25,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:53:25,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:53:25,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:53:25,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:53:25,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:53:25,656 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:53:25,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:53:25,656 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:53:25,656 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:53:25,656 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:53:25,657 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_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 [2022-12-13 11:53:25,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:53:25,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:53:25,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:53:25,862 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:53:25,862 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:53:25,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2022-12-13 11:53:28,379 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:53:28,719 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:53:28,719 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2022-12-13 11:53:28,742 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/data/98ab60735/4322285840854c9883237822287a6bdd/FLAGd6b440a78 [2022-12-13 11:53:28,951 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/data/98ab60735/4322285840854c9883237822287a6bdd [2022-12-13 11:53:28,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:53:28,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:53:28,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:53:28,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:53:28,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:53:28,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:53:28" (1/1) ... [2022-12-13 11:53:28,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e1f46a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:53:28, skipping insertion in model container [2022-12-13 11:53:28,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:53:28" (1/1) ... [2022-12-13 11:53:28,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:53:29,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:53:29,218 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_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2022-12-13 11:53:29,224 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_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2022-12-13 11:53:29,768 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:29,769 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:29,769 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:29,769 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:29,770 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:29,780 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:29,780 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:29,781 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:29,782 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:29,783 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:29,784 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:29,785 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:29,785 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:29,838 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 11:53:29,838 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 11:53:29,839 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 11:53:29,844 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 11:53:29,847 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 11:53:29,847 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 11:53:30,111 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 11:53:30,112 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 11:53:30,112 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 11:53:30,113 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 11:53:30,114 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 11:53:30,115 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 11:53:30,115 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 11:53:30,116 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 11:53:30,116 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 11:53:30,117 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 11:53:30,117 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 11:53:30,227 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 11:53:30,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:53:30,267 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:53:30,278 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_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2022-12-13 11:53:30,279 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_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2022-12-13 11:53:30,313 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:30,314 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:30,314 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:30,315 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:30,315 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:30,322 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:30,323 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:30,324 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:30,324 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:30,325 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:30,326 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:30,326 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:30,326 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-13 11:53:30,333 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 11:53:30,333 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 11:53:30,334 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-13 11:53:30,337 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-13 11:53:30,339 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-13 11:53:30,339 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-13 11:53:30,361 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-13 11:53:30,362 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-13 11:53:30,363 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-13 11:53:30,363 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-13 11:53:30,364 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-13 11:53:30,365 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-13 11:53:30,366 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-13 11:53:30,366 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-13 11:53:30,367 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-13 11:53:30,367 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-13 11:53:30,367 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-13 11:53:30,385 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-13 11:53:30,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:53:30,518 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:53:30,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:53:30 WrapperNode [2022-12-13 11:53:30,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:53:30,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:53:30,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:53:30,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:53:30,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:53:30" (1/1) ... [2022-12-13 11:53:30,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:53:30" (1/1) ... [2022-12-13 11:53:30,591 INFO L138 Inliner]: procedures = 679, calls = 1031, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 28 [2022-12-13 11:53:30,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:53:30,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:53:30,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:53:30,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:53:30,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:53:30" (1/1) ... [2022-12-13 11:53:30,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:53:30" (1/1) ... [2022-12-13 11:53:30,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:53:30" (1/1) ... [2022-12-13 11:53:30,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:53:30" (1/1) ... [2022-12-13 11:53:30,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:53:30" (1/1) ... [2022-12-13 11:53:30,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:53:30" (1/1) ... [2022-12-13 11:53:30,612 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:53:30" (1/1) ... [2022-12-13 11:53:30,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:53:30" (1/1) ... [2022-12-13 11:53:30,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:53:30,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:53:30,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:53:30,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:53:30,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:53:30" (1/1) ... [2022-12-13 11:53:30,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:53:30,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:53:30,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:53:30,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:53:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2022-12-13 11:53:30,672 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2022-12-13 11:53:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-12-13 11:53:30,672 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-12-13 11:53:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:53:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:53:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 11:53:30,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 11:53:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:53:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:53:30,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:53:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-12-13 11:53:30,673 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-12-13 11:53:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 11:53:30,673 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 11:53:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:53:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 11:53:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:53:30,843 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:53:30,845 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:53:30,967 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:53:30,972 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:53:30,972 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 11:53:30,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:53:30 BoogieIcfgContainer [2022-12-13 11:53:30,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:53:30,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:53:30,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:53:30,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:53:30,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:53:28" (1/3) ... [2022-12-13 11:53:30,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29208ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:53:30, skipping insertion in model container [2022-12-13 11:53:30,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:53:30" (2/3) ... [2022-12-13 11:53:30,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29208ca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:53:30, skipping insertion in model container [2022-12-13 11:53:30,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:53:30" (3/3) ... [2022-12-13 11:53:30,982 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness.i [2022-12-13 11:53:31,000 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:53:31,000 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 11:53:31,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:53:31,053 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;@46797d97, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:53:31,053 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 11:53:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:53:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 11:53:31,063 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:53:31,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:53:31,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:53:31,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:53:31,068 INFO L85 PathProgramCache]: Analyzing trace with hash -527313499, now seen corresponding path program 1 times [2022-12-13 11:53:31,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:53:31,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267582605] [2022-12-13 11:53:31,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:53:31,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:53:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:31,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 11:53:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:31,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 11:53:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:53:31,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:53:31,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267582605] [2022-12-13 11:53:31,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267582605] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:53:31,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:53:31,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:53:31,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108252639] [2022-12-13 11:53:31,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:53:31,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 11:53:31,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:53:31,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 11:53:31,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 11:53:31,321 INFO L87 Difference]: Start difference. First operand has 41 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:53:31,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:53:31,336 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2022-12-13 11:53:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 11:53:31,337 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-12-13 11:53:31,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:53:31,342 INFO L225 Difference]: With dead ends: 75 [2022-12-13 11:53:31,342 INFO L226 Difference]: Without dead ends: 36 [2022-12-13 11:53:31,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 11:53:31,346 INFO L413 NwaCegarLoop]: 45 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, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:53:31,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:53:31,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-13 11:53:31,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-13 11:53:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 11:53:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-12-13 11:53:31,371 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2022-12-13 11:53:31,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:53:31,371 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-12-13 11:53:31,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:53:31,371 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-12-13 11:53:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 11:53:31,372 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:53:31,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:53:31,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:53:31,372 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:53:31,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:53:31,373 INFO L85 PathProgramCache]: Analyzing trace with hash 74286250, now seen corresponding path program 1 times [2022-12-13 11:53:31,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:53:31,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314453999] [2022-12-13 11:53:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:53:31,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:53:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:31,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 11:53:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:31,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 11:53:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:31,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 11:53:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:53:31,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:53:31,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314453999] [2022-12-13 11:53:31,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314453999] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:53:31,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:53:31,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:53:31,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994764392] [2022-12-13 11:53:31,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:53:31,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:53:31,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:53:31,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:53:31,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:53:31,692 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 11:53:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:53:31,814 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-12-13 11:53:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:53:31,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-12-13 11:53:31,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:53:31,815 INFO L225 Difference]: With dead ends: 61 [2022-12-13 11:53:31,815 INFO L226 Difference]: Without dead ends: 37 [2022-12-13 11:53:31,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:53:31,816 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:53:31,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 63 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:53:31,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-13 11:53:31,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-12-13 11:53:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 11:53:31,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-12-13 11:53:31,821 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2022-12-13 11:53:31,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:53:31,821 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-12-13 11:53:31,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 11:53:31,822 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-12-13 11:53:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 11:53:31,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:53:31,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:53:31,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:53:31,822 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:53:31,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:53:31,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2047649194, now seen corresponding path program 1 times [2022-12-13 11:53:31,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:53:31,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556480393] [2022-12-13 11:53:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:53:31,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:53:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:31,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 11:53:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:31,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 11:53:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:32,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 11:53:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:53:32,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:53:32,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556480393] [2022-12-13 11:53:32,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556480393] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:53:32,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202445889] [2022-12-13 11:53:32,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:53:32,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:53:32,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:53:32,053 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:53:32,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:53:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:32,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 11:53:32,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:53:32,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:53:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:53:32,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:53:32,938 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 14 treesize of output 12 [2022-12-13 11:53:32,942 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 22 treesize of output 20 [2022-12-13 11:53:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:53:32,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202445889] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:53:32,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:53:32,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 18 [2022-12-13 11:53:32,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303312187] [2022-12-13 11:53:32,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:53:32,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:53:32,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:53:32,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:53:32,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:53:32,972 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 11:53:35,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:53:35,122 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-12-13 11:53:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:53:35,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 27 [2022-12-13 11:53:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:53:35,124 INFO L225 Difference]: With dead ends: 70 [2022-12-13 11:53:35,124 INFO L226 Difference]: Without dead ends: 46 [2022-12-13 11:53:35,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-12-13 11:53:35,125 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:53:35,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 106 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 349 Invalid, 1 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 11:53:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-13 11:53:35,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2022-12-13 11:53:35,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-13 11:53:35,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-12-13 11:53:35,133 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 27 [2022-12-13 11:53:35,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:53:35,133 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-12-13 11:53:35,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 11:53:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-12-13 11:53:35,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 11:53:35,134 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:53:35,134 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:53:35,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:53:35,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:53:35,335 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:53:35,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:53:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash -676233421, now seen corresponding path program 1 times [2022-12-13 11:53:35,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:53:35,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271341974] [2022-12-13 11:53:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:53:35,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:53:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:35,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 11:53:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:35,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 11:53:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:35,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 11:53:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 11:53:35,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:53:35,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271341974] [2022-12-13 11:53:35,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271341974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:53:35,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:53:35,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 11:53:35,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435690050] [2022-12-13 11:53:35,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:53:35,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 11:53:35,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:53:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 11:53:35,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:53:35,507 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 11:53:35,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:53:35,633 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-12-13 11:53:35,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:53:35,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-12-13 11:53:35,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:53:35,635 INFO L225 Difference]: With dead ends: 52 [2022-12-13 11:53:35,635 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 11:53:35,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:53:35,636 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:53:35,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 101 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:53:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 11:53:35,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-12-13 11:53:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-13 11:53:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-12-13 11:53:35,647 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 28 [2022-12-13 11:53:35,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:53:35,648 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-12-13 11:53:35,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 11:53:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-12-13 11:53:35,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 11:53:35,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:53:35,650 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:53:35,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 11:53:35,650 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:53:35,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:53:35,650 INFO L85 PathProgramCache]: Analyzing trace with hash 859323928, now seen corresponding path program 1 times [2022-12-13 11:53:35,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:53:35,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459327218] [2022-12-13 11:53:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:53:35,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:53:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:35,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 11:53:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:35,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 11:53:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:35,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 11:53:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:53:35,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:53:35,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459327218] [2022-12-13 11:53:35,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459327218] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:53:35,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085433443] [2022-12-13 11:53:35,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:53:35,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:53:35,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:53:35,923 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:53:35,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:53:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:53:36,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 11:53:36,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:53:36,030 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 14 treesize of output 10 [2022-12-13 11:53:36,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-12-13 11:53:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:53:38,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:53:39,331 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 22 treesize of output 20 [2022-12-13 11:53:39,334 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 54 treesize of output 50 [2022-12-13 11:53:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:53:39,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085433443] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:53:39,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:53:39,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 10] total 23 [2022-12-13 11:53:39,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006638762] [2022-12-13 11:53:39,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:53:39,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:53:39,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:53:39,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:53:39,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=438, Unknown=1, NotChecked=0, Total=506 [2022-12-13 11:53:39,384 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 11:53:41,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:53:43,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:53:45,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:53:51,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:53:53,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:53:55,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:53:57,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:53:59,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:54:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:54:00,091 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2022-12-13 11:54:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 11:54:00,091 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 31 [2022-12-13 11:54:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:54:00,092 INFO L225 Difference]: With dead ends: 119 [2022-12-13 11:54:00,092 INFO L226 Difference]: Without dead ends: 74 [2022-12-13 11:54:00,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=224, Invalid=1412, Unknown=4, NotChecked=0, Total=1640 [2022-12-13 11:54:00,093 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 103 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 19 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:54:00,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 159 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 600 Invalid, 15 Unknown, 0 Unchecked, 17.7s Time] [2022-12-13 11:54:00,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-13 11:54:00,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 58. [2022-12-13 11:54:00,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 11:54:00,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2022-12-13 11:54:00,109 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 31 [2022-12-13 11:54:00,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:54:00,109 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2022-12-13 11:54:00,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 11:54:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2022-12-13 11:54:00,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 11:54:00,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:54:00,110 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:54:00,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:54:00,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:00,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:54:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2009920790, now seen corresponding path program 2 times [2022-12-13 11:54:00,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:00,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119664815] [2022-12-13 11:54:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:00,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:00,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 11:54:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:00,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 11:54:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:00,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 11:54:00,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 11:54:00,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:00,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119664815] [2022-12-13 11:54:00,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119664815] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:00,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237028287] [2022-12-13 11:54:00,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:54:00,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:00,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:00,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:54:00,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:54:00,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:54:00,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:54:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 11:54:00,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:54:00,804 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 14 treesize of output 10 [2022-12-13 11:54:00,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-12-13 11:54:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:54:05,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:54:06,028 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 22 treesize of output 20 [2022-12-13 11:54:06,030 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 54 treesize of output 50 [2022-12-13 11:54:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:54:06,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237028287] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:54:06,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:54:06,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 12] total 28 [2022-12-13 11:54:06,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206250536] [2022-12-13 11:54:06,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:54:06,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 11:54:06,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:06,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 11:54:06,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=664, Unknown=2, NotChecked=0, Total=756 [2022-12-13 11:54:06,116 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 26 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 11:54:13,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:54:13,784 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2022-12-13 11:54:13,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 11:54:13,785 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 26 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 35 [2022-12-13 11:54:13,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:54:13,785 INFO L225 Difference]: With dead ends: 137 [2022-12-13 11:54:13,785 INFO L226 Difference]: Without dead ends: 89 [2022-12-13 11:54:13,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=213, Invalid=1505, Unknown=4, NotChecked=0, Total=1722 [2022-12-13 11:54:13,786 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 95 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 11:54:13,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 165 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 11:54:13,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-13 11:54:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2022-12-13 11:54:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 47 states have internal predecessors, (51), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 11:54:13,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2022-12-13 11:54:13,795 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 35 [2022-12-13 11:54:13,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:54:13,796 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2022-12-13 11:54:13,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 26 states have internal predecessors, (59), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 11:54:13,796 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2022-12-13 11:54:13,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 11:54:13,796 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:54:13,796 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:54:13,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:54:13,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 11:54:13,998 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:54:13,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:13,999 INFO L85 PathProgramCache]: Analyzing trace with hash 964902744, now seen corresponding path program 3 times [2022-12-13 11:54:13,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:14,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681168639] [2022-12-13 11:54:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:14,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:14,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 11:54:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:14,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 11:54:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:14,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 11:54:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:54:14,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:14,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681168639] [2022-12-13 11:54:14,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681168639] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:14,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243536528] [2022-12-13 11:54:14,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:54:14,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:14,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:14,305 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:54:14,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:54:14,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:54:14,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:54:14,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-13 11:54:14,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:54:14,508 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 14 treesize of output 10 [2022-12-13 11:54:14,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 11:54:14,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:14,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-12-13 11:54:14,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:14,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2022-12-13 11:54:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:54:14,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:54:14,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243536528] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:14,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:54:14,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2022-12-13 11:54:14,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085784499] [2022-12-13 11:54:14,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:54:14,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:54:14,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:14,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:54:14,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:54:14,905 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 17 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 11:54:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:54:15,531 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2022-12-13 11:54:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:54:15,531 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2022-12-13 11:54:15,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:54:15,532 INFO L225 Difference]: With dead ends: 109 [2022-12-13 11:54:15,532 INFO L226 Difference]: Without dead ends: 63 [2022-12-13 11:54:15,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-12-13 11:54:15,533 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:54:15,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 140 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 11:54:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-13 11:54:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-12-13 11:54:15,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 48 states have internal predecessors, (52), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 11:54:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2022-12-13 11:54:15,541 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 39 [2022-12-13 11:54:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:54:15,541 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2022-12-13 11:54:15,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 11:54:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2022-12-13 11:54:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 11:54:15,542 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:54:15,542 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:54:15,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:54:15,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 11:54:15,744 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:54:15,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:54:15,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1642266924, now seen corresponding path program 4 times [2022-12-13 11:54:15,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:54:15,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153720665] [2022-12-13 11:54:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:54:15,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:54:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:15,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 11:54:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:15,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 11:54:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:16,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 11:54:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:54:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:54:16,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:54:16,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153720665] [2022-12-13 11:54:16,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153720665] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:54:16,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590216905] [2022-12-13 11:54:16,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:54:16,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:54:16,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:54:16,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:54:16,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:54:16,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:54:16,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:54:16,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-13 11:54:16,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:54:16,244 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 14 treesize of output 10 [2022-12-13 11:54:16,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 11:54:16,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:16,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-12-13 11:54:16,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:16,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2022-12-13 11:54:16,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:16,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 78 [2022-12-13 11:54:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:54:33,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:54:36,284 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 82 treesize of output 78 [2022-12-13 11:54:36,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:54:36,291 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 1008 treesize of output 1000 [2022-12-13 11:54:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:54:36,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590216905] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:54:36,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:54:36,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 17] total 40 [2022-12-13 11:54:36,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788693304] [2022-12-13 11:54:36,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:54:36,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 11:54:36,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:54:36,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 11:54:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1393, Unknown=8, NotChecked=0, Total=1560 [2022-12-13 11:54:36,432 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 38 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 11:55:00,391 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 85 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:55:01,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:55:14,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:55:14,092 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2022-12-13 11:55:14,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 11:55:14,093 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 38 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 40 [2022-12-13 11:55:14,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:55:14,094 INFO L225 Difference]: With dead ends: 153 [2022-12-13 11:55:14,094 INFO L226 Difference]: Without dead ends: 102 [2022-12-13 11:55:14,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 52.8s TimeCoverageRelationStatistics Valid=363, Invalid=3169, Unknown=8, NotChecked=0, Total=3540 [2022-12-13 11:55:14,095 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 127 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-13 11:55:14,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 179 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1306 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-12-13 11:55:14,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-13 11:55:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2022-12-13 11:55:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.12) internal successors, (56), 52 states have internal predecessors, (56), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 11:55:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2022-12-13 11:55:14,112 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 40 [2022-12-13 11:55:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:55:14,113 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2022-12-13 11:55:14,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 38 states have internal predecessors, (71), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 11:55:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2022-12-13 11:55:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 11:55:14,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:55:14,114 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:55:14,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 11:55:14,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:14,315 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:55:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:55:14,316 INFO L85 PathProgramCache]: Analyzing trace with hash -84428886, now seen corresponding path program 5 times [2022-12-13 11:55:14,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:55:14,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591921771] [2022-12-13 11:55:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:55:14,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:55:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:14,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 11:55:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:14,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 11:55:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:14,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 11:55:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:55:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 11:55:14,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:55:14,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591921771] [2022-12-13 11:55:14,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591921771] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:55:14,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268867553] [2022-12-13 11:55:14,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:55:14,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:55:14,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:55:14,804 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:55:14,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:55:15,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 11:55:15,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:55:15,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-13 11:55:15,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:55:15,300 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 14 treesize of output 10 [2022-12-13 11:55:15,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 11:55:15,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:15,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-12-13 11:55:15,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:15,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2022-12-13 11:55:15,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:55:15,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 77 [2022-12-13 11:55:15,612 INFO L321 Elim1Store]: treesize reduction 165, result has 28.3 percent of original size [2022-12-13 11:55:15,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 89 [2022-12-13 11:55:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:31,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:55:33,698 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 45 treesize of output 43 [2022-12-13 11:55:33,704 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 7702 treesize of output 7670 [2022-12-13 11:55:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:55:35,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268867553] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:55:35,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:55:35,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 17] total 41 [2022-12-13 11:55:35,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571314780] [2022-12-13 11:55:35,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:55:35,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 11:55:35,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:55:35,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 11:55:35,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1483, Unknown=7, NotChecked=0, Total=1640 [2022-12-13 11:55:35,817 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 39 states have internal predecessors, (80), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 11:55:38,964 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] [2022-12-13 11:55:40,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:55:43,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:55:53,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:55:55,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:55:57,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:55:59,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:56:01,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:56:03,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:56:04,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:56:04,745 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2022-12-13 11:56:04,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 11:56:04,746 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 39 states have internal predecessors, (80), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-12-13 11:56:04,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:56:04,747 INFO L225 Difference]: With dead ends: 158 [2022-12-13 11:56:04,747 INFO L226 Difference]: Without dead ends: 107 [2022-12-13 11:56:04,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=347, Invalid=3675, Unknown=10, NotChecked=0, Total=4032 [2022-12-13 11:56:04,748 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 154 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 1484 mSolverCounterSat, 12 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1484 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:56:04,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 222 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1484 Invalid, 14 Unknown, 0 Unchecked, 18.4s Time] [2022-12-13 11:56:04,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-13 11:56:04,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 71. [2022-12-13 11:56:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 56 states have internal predecessors, (61), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 11:56:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-12-13 11:56:04,762 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 44 [2022-12-13 11:56:04,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:56:04,763 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-12-13 11:56:04,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 39 states have internal predecessors, (80), 4 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 11:56:04,763 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-12-13 11:56:04,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 11:56:04,763 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:56:04,763 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:56:04,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 11:56:04,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 11:56:04,965 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:56:04,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:04,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1506836076, now seen corresponding path program 6 times [2022-12-13 11:56:04,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:04,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112652453] [2022-12-13 11:56:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:04,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:05,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 11:56:05,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:05,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 11:56:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:05,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 11:56:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 11:56:05,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:05,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112652453] [2022-12-13 11:56:05,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112652453] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:56:05,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459622696] [2022-12-13 11:56:05,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:56:05,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:05,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:56:05,329 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:56:05,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:56:05,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 11:56:05,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:56:05,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-13 11:56:05,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:05,822 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 14 treesize of output 10 [2022-12-13 11:56:05,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 11:56:05,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:05,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-12-13 11:56:05,908 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:05,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2022-12-13 11:56:05,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:05,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 63 [2022-12-13 11:56:05,995 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:05,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 76 [2022-12-13 11:56:06,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:06,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 75 treesize of output 89 [2022-12-13 11:56:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 11:56:06,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:06,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459622696] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:56:06,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:56:06,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 23 [2022-12-13 11:56:06,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30907448] [2022-12-13 11:56:06,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:56:06,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:56:06,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:56:06,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:56:06,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2022-12-13 11:56:06,656 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 11:56:07,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:56:07,705 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-12-13 11:56:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 11:56:07,706 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2022-12-13 11:56:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:56:07,707 INFO L225 Difference]: With dead ends: 124 [2022-12-13 11:56:07,707 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 11:56:07,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 11:56:07,708 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:56:07,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 137 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 11:56:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 11:56:07,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-12-13 11:56:07,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 57 states have internal predecessors, (62), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 11:56:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2022-12-13 11:56:07,722 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 48 [2022-12-13 11:56:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:56:07,723 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2022-12-13 11:56:07,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 11:56:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2022-12-13 11:56:07,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 11:56:07,723 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:56:07,723 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:56:07,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 11:56:07,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:07,925 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:56:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:56:07,926 INFO L85 PathProgramCache]: Analyzing trace with hash -680817896, now seen corresponding path program 7 times [2022-12-13 11:56:07,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:56:07,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425794518] [2022-12-13 11:56:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:56:07,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:56:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:08,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 11:56:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:08,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 11:56:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:08,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 11:56:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 11:56:08,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:56:08,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425794518] [2022-12-13 11:56:08,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425794518] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:56:08,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83109327] [2022-12-13 11:56:08,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:56:08,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:56:08,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:56:08,393 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:56:08,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37ffbc0d-e1fe-4b8b-b1e9-33af59d7ef50/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:56:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:56:08,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-13 11:56:08,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:56:08,762 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 14 treesize of output 10 [2022-12-13 11:56:08,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 11:56:08,822 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:08,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-12-13 11:56:08,868 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:08,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 50 [2022-12-13 11:56:08,919 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:08,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 63 [2022-12-13 11:56:08,983 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:08,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 76 [2022-12-13 11:56:09,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:09,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 75 treesize of output 89 [2022-12-13 11:56:09,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:09,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 74 treesize of output 88 [2022-12-13 11:56:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:56:11,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:56:15,401 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 118 treesize of output 114 [2022-12-13 11:56:15,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:56:15,416 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 43880 treesize of output 43840