./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:34:13,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:34:13,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:34:13,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:34:13,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:34:13,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:34:13,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:34:13,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:34:13,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:34:13,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:34:13,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:34:13,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:34:13,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:34:13,573 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:34:13,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:34:13,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:34:13,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:34:13,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:34:13,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:34:13,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:34:13,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:34:13,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:34:13,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:34:13,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:34:13,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:34:13,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:34:13,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:34:13,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:34:13,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:34:13,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:34:13,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:34:13,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:34:13,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:34:13,621 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:34:13,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:34:13,623 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:34:13,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:34:13,624 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:34:13,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:34:13,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:34:13,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:34:13,628 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-25 18:34:13,671 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:34:13,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:34:13,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:34:13,681 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:34:13,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:34:13,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:34:13,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:34:13,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:34:13,683 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:34:13,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:34:13,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:34:13,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:34:13,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:34:13,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:34:13,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:34:13,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:34:13,687 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:34:13,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:34:13,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:34:13,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:34:13,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:34:13,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:34:13,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:34:13,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:34:13,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:34:13,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:34:13,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:34:13,690 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:34:13,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:34:13,691 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:34:13,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:34:13,691 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_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab48078691743837960e369bd318845908490844fac300de97818a03fa84d8a1 [2022-11-25 18:34:14,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:34:14,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:34:14,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:34:14,097 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:34:14,097 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:34:14,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2022-11-25 18:34:17,332 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:34:18,035 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:34:18,036 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i [2022-11-25 18:34:18,086 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/data/3654ea925/8531b2817ef7464bbb0ea6b7bfa941df/FLAG4af664933 [2022-11-25 18:34:18,136 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/data/3654ea925/8531b2817ef7464bbb0ea6b7bfa941df [2022-11-25 18:34:18,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:34:18,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:34:18,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:34:18,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:34:18,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:34:18,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:34:18" (1/1) ... [2022-11-25 18:34:18,163 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@374bd737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:18, skipping insertion in model container [2022-11-25 18:34:18,163 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:34:18" (1/1) ... [2022-11-25 18:34:18,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:34:18,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:34:18,656 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_08846378-1f92-4187-a92c-65cf39bc3cc4/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4498,4511] [2022-11-25 18:34:18,671 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_08846378-1f92-4187-a92c-65cf39bc3cc4/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4558,4571] [2022-11-25 18:34:20,157 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:20,158 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:20,159 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:20,160 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:20,162 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:20,183 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:20,184 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:20,186 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:20,194 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:20,320 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 18:34:20,321 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 18:34:20,322 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 18:34:20,339 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 18:34:20,341 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 18:34:20,346 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 18:34:20,915 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 18:34:20,923 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 18:34:20,924 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 18:34:20,926 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 18:34:20,938 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 18:34:20,940 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 18:34:20,943 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 18:34:20,944 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 18:34:20,945 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 18:34:20,946 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 18:34:20,947 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 18:34:21,216 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 18:34:21,270 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-25 18:34:21,284 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 18:34:21,322 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 18:34:21,334 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,335 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,437 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 18:34:21,769 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,770 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,819 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,821 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,833 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,834 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,858 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,859 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,860 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,861 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,861 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,862 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,864 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:21,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:34:22,005 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:34:22,039 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_08846378-1f92-4187-a92c-65cf39bc3cc4/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4498,4511] [2022-11-25 18:34:22,039 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_08846378-1f92-4187-a92c-65cf39bc3cc4/sv-benchmarks/c/aws-c-common/aws_hash_byte_cursor_ptr_harness.i[4558,4571] [2022-11-25 18:34:22,099 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,099 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,100 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,100 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,102 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,109 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,111 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,112 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,113 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,123 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 18:34:22,124 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 18:34:22,124 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 18:34:22,130 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 18:34:22,131 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 18:34:22,133 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 18:34:22,165 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 18:34:22,166 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 18:34:22,167 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 18:34:22,168 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 18:34:22,169 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 18:34:22,170 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 18:34:22,171 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 18:34:22,172 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 18:34:22,173 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 18:34:22,174 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 18:34:22,175 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 18:34:22,215 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 18:34:22,246 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-25 18:34:22,253 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 18:34:22,277 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 18:34:22,285 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,288 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,401 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 18:34:22,549 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,549 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,559 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,560 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,565 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,566 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,577 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,577 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,578 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,580 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,580 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,581 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,582 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 18:34:22,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:34:23,001 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:34:23,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:23 WrapperNode [2022-11-25 18:34:23,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:34:23,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:34:23,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:34:23,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:34:23,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:23" (1/1) ... [2022-11-25 18:34:23,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:23" (1/1) ... [2022-11-25 18:34:23,279 INFO L138 Inliner]: procedures = 776, calls = 3575, calls flagged for inlining = 77, calls inlined = 6, statements flattened = 786 [2022-11-25 18:34:23,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:34:23,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:34:23,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:34:23,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:34:23,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:23" (1/1) ... [2022-11-25 18:34:23,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:23" (1/1) ... [2022-11-25 18:34:23,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:23" (1/1) ... [2022-11-25 18:34:23,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:23" (1/1) ... [2022-11-25 18:34:23,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:23" (1/1) ... [2022-11-25 18:34:23,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:23" (1/1) ... [2022-11-25 18:34:23,384 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:23" (1/1) ... [2022-11-25 18:34:23,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:23" (1/1) ... [2022-11-25 18:34:23,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:34:23,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:34:23,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:34:23,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:34:23,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:23" (1/1) ... [2022-11-25 18:34:23,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:34:23,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:23,477 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:34:23,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:34:23,543 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-25 18:34:23,544 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-25 18:34:23,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:34:23,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 18:34:23,544 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 18:34:23,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:34:23,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:34:23,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 18:34:23,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:34:23,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:34:23,545 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-25 18:34:23,546 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-25 18:34:23,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:34:23,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 18:34:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure hashlittle2 [2022-11-25 18:34:23,547 INFO L138 BoogieDeclarations]: Found implementation of procedure hashlittle2 [2022-11-25 18:34:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:34:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-11-25 18:34:23,547 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-11-25 18:34:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:34:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 18:34:23,548 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 18:34:23,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 18:34:23,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:34:23,973 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:34:23,976 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:34:26,994 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !true; [2022-11-25 18:34:27,006 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:34:27,017 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:34:27,017 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-25 18:34:27,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:34:27 BoogieIcfgContainer [2022-11-25 18:34:27,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:34:27,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:34:27,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:34:27,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:34:27,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:34:18" (1/3) ... [2022-11-25 18:34:27,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcbf83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:34:27, skipping insertion in model container [2022-11-25 18:34:27,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:23" (2/3) ... [2022-11-25 18:34:27,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcbf83f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:34:27, skipping insertion in model container [2022-11-25 18:34:27,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:34:27" (3/3) ... [2022-11-25 18:34:27,043 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_byte_cursor_ptr_harness.i [2022-11-25 18:34:27,066 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:34:27,067 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:34:27,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:34:27,193 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;@6bdcb236, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:34:27,193 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 18:34:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 18:34:27,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-25 18:34:27,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:27,221 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:27,222 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:34:27,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:27,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1196197405, now seen corresponding path program 1 times [2022-11-25 18:34:27,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:27,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352211083] [2022-11-25 18:34:27,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:27,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:28,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:34:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:28,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:34:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:28,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:34:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:28,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-25 18:34:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:28,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-25 18:34:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:28,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 18:34:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:28,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-25 18:34:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:28,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 18:34:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 18:34:28,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:28,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352211083] [2022-11-25 18:34:28,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352211083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:28,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:28,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:34:28,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775902662] [2022-11-25 18:34:28,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:28,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:34:28,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:28,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:34:28,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:34:28,400 INFO L87 Difference]: Start difference. First operand has 134 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 18:34:28,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:28,938 INFO L93 Difference]: Finished difference Result 263 states and 398 transitions. [2022-11-25 18:34:28,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:34:28,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-11-25 18:34:28,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:28,952 INFO L225 Difference]: With dead ends: 263 [2022-11-25 18:34:28,952 INFO L226 Difference]: Without dead ends: 128 [2022-11-25 18:34:28,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:34:28,963 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 28 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:28,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 243 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 18:34:28,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-25 18:34:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-11-25 18:34:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.4907407407407407) internal successors, (161), 109 states have internal predecessors, (161), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 18:34:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 186 transitions. [2022-11-25 18:34:29,025 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 186 transitions. Word has length 62 [2022-11-25 18:34:29,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:29,026 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 186 transitions. [2022-11-25 18:34:29,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 18:34:29,026 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 186 transitions. [2022-11-25 18:34:29,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-25 18:34:29,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:29,029 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:29,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:34:29,064 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:34:29,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:29,065 INFO L85 PathProgramCache]: Analyzing trace with hash -902599839, now seen corresponding path program 1 times [2022-11-25 18:34:29,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:29,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39004989] [2022-11-25 18:34:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:29,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:29,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:34:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:29,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:34:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:29,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:34:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:30,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-25 18:34:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:30,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-25 18:34:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:30,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 18:34:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:30,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-25 18:34:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:30,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 18:34:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 18:34:30,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:30,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39004989] [2022-11-25 18:34:30,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39004989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:30,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001710626] [2022-11-25 18:34:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:30,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:30,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:30,323 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:30,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:34:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:31,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 2558 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:34:31,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 18:34:31,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:34:31,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001710626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:31,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:34:31,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-25 18:34:31,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457256937] [2022-11-25 18:34:31,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:31,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:34:31,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:31,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:34:31,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:34:31,232 INFO L87 Difference]: Start difference. First operand 128 states and 186 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 18:34:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:31,443 INFO L93 Difference]: Finished difference Result 239 states and 354 transitions. [2022-11-25 18:34:31,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:34:31,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-11-25 18:34:31,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:31,453 INFO L225 Difference]: With dead ends: 239 [2022-11-25 18:34:31,453 INFO L226 Difference]: Without dead ends: 131 [2022-11-25 18:34:31,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:34:31,461 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 194 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:31,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 634 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:34:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-25 18:34:31,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-25 18:34:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-25 18:34:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 190 transitions. [2022-11-25 18:34:31,487 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 190 transitions. Word has length 62 [2022-11-25 18:34:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:31,488 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 190 transitions. [2022-11-25 18:34:31,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 18:34:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 190 transitions. [2022-11-25 18:34:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-25 18:34:31,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:31,501 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:31,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:31,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-25 18:34:31,712 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:34:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:31,712 INFO L85 PathProgramCache]: Analyzing trace with hash 90546502, now seen corresponding path program 1 times [2022-11-25 18:34:31,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:31,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511265896] [2022-11-25 18:34:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:31,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:32,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:34:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:32,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:34:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:32,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:34:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:33,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 18:34:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:33,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 18:34:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:33,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 18:34:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:33,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-25 18:34:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:33,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-25 18:34:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:34:33,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:33,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511265896] [2022-11-25 18:34:33,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511265896] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:33,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061276069] [2022-11-25 18:34:33,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:33,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:33,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:33,344 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:33,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:34:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:33,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 2563 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:34:33,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 18:34:34,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:34:34,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061276069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:34,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:34:34,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-11-25 18:34:34,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453009428] [2022-11-25 18:34:34,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:34,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:34:34,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:34,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:34:34,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:34:34,115 INFO L87 Difference]: Start difference. First operand 131 states and 190 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 18:34:34,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:34,311 INFO L93 Difference]: Finished difference Result 239 states and 350 transitions. [2022-11-25 18:34:34,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:34:34,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2022-11-25 18:34:34,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:34,313 INFO L225 Difference]: With dead ends: 239 [2022-11-25 18:34:34,313 INFO L226 Difference]: Without dead ends: 131 [2022-11-25 18:34:34,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-25 18:34:34,315 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 198 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:34,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 794 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:34:34,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-25 18:34:34,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-25 18:34:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 110 states have (on average 1.481818181818182) internal successors, (163), 112 states have internal predecessors, (163), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-25 18:34:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 189 transitions. [2022-11-25 18:34:34,347 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 189 transitions. Word has length 64 [2022-11-25 18:34:34,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:34,348 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 189 transitions. [2022-11-25 18:34:34,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 18:34:34,348 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 189 transitions. [2022-11-25 18:34:34,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-25 18:34:34,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:34,351 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:34,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:34,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:34,561 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:34:34,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:34,562 INFO L85 PathProgramCache]: Analyzing trace with hash -249804501, now seen corresponding path program 2 times [2022-11-25 18:34:34,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:34,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299122065] [2022-11-25 18:34:34,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:34,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:35,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:34:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:35,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:34:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:35,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:34:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:35,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 18:34:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:35,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 18:34:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:35,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 18:34:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:35,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 18:34:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:36,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 18:34:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:34:36,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:36,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299122065] [2022-11-25 18:34:36,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299122065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:36,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021175939] [2022-11-25 18:34:36,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:34:36,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:36,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:36,129 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:36,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:34:38,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:34:38,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:34:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 2568 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:34:38,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:38,635 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:34:38,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-25 18:34:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 18:34:38,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:34:38,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021175939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:38,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:34:38,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2022-11-25 18:34:38,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631360129] [2022-11-25 18:34:38,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:38,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:34:38,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:38,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:34:38,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:34:38,867 INFO L87 Difference]: Start difference. First operand 131 states and 189 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 18:34:39,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:39,153 INFO L93 Difference]: Finished difference Result 174 states and 239 transitions. [2022-11-25 18:34:39,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:34:39,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 66 [2022-11-25 18:34:39,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:39,155 INFO L225 Difference]: With dead ends: 174 [2022-11-25 18:34:39,155 INFO L226 Difference]: Without dead ends: 141 [2022-11-25 18:34:39,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-11-25 18:34:39,157 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 191 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:39,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 817 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 18:34:39,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-25 18:34:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-11-25 18:34:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 120 states have (on average 1.4666666666666666) internal successors, (176), 121 states have internal predecessors, (176), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 18:34:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 201 transitions. [2022-11-25 18:34:39,169 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 201 transitions. Word has length 66 [2022-11-25 18:34:39,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:39,169 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 201 transitions. [2022-11-25 18:34:39,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 18:34:39,170 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 201 transitions. [2022-11-25 18:34:39,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 18:34:39,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:39,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:39,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 18:34:39,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:39,382 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:34:39,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:39,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1967970000, now seen corresponding path program 1 times [2022-11-25 18:34:39,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:39,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040953996] [2022-11-25 18:34:39,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:39,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:41,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:34:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:41,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:34:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:41,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:34:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:41,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 18:34:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:41,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 18:34:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:41,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 18:34:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:41,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 18:34:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:42,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 18:34:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 18:34:42,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:42,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040953996] [2022-11-25 18:34:42,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040953996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:42,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477602514] [2022-11-25 18:34:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:42,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:42,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:42,160 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:42,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:34:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 2573 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 18:34:42,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 18:34:43,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 18:34:43,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477602514] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:43,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:34:43,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 11] total 25 [2022-11-25 18:34:43,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372849514] [2022-11-25 18:34:43,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:43,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:34:43,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:43,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:34:43,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2022-11-25 18:34:43,320 INFO L87 Difference]: Start difference. First operand 141 states and 201 transitions. Second operand has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-25 18:34:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:43,436 INFO L93 Difference]: Finished difference Result 157 states and 219 transitions. [2022-11-25 18:34:43,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:34:43,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 68 [2022-11-25 18:34:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:43,438 INFO L225 Difference]: With dead ends: 157 [2022-11-25 18:34:43,438 INFO L226 Difference]: Without dead ends: 155 [2022-11-25 18:34:43,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2022-11-25 18:34:43,439 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 18 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:43,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1236 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:34:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-25 18:34:43,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 150. [2022-11-25 18:34:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 126 states have (on average 1.4444444444444444) internal successors, (182), 128 states have internal predecessors, (182), 14 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-25 18:34:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 211 transitions. [2022-11-25 18:34:43,452 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 211 transitions. Word has length 68 [2022-11-25 18:34:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:43,453 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 211 transitions. [2022-11-25 18:34:43,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-25 18:34:43,453 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 211 transitions. [2022-11-25 18:34:43,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 18:34:43,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:43,454 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:43,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-25 18:34:43,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:43,668 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:34:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:43,668 INFO L85 PathProgramCache]: Analyzing trace with hash -278658024, now seen corresponding path program 1 times [2022-11-25 18:34:43,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:43,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932092325] [2022-11-25 18:34:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:43,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:45,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:34:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:45,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:34:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:45,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:34:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:45,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 18:34:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:45,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 18:34:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:45,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 18:34:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:45,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 18:34:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:45,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 18:34:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 18:34:46,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:46,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932092325] [2022-11-25 18:34:46,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932092325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:46,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325941980] [2022-11-25 18:34:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:46,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:46,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:46,013 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:46,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:34:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:46,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 2585 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-25 18:34:46,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:46,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:34:47,820 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 18:34:47,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-25 18:34:48,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:34:48,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:34:48,467 INFO L321 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-11-25 18:34:48,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 103 [2022-11-25 18:34:48,486 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-25 18:34:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:34:48,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:49,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325941980] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:49,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:34:49,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-11-25 18:34:49,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994140334] [2022-11-25 18:34:49,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:49,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 18:34:49,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:49,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 18:34:49,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-11-25 18:34:49,046 INFO L87 Difference]: Start difference. First operand 150 states and 211 transitions. Second operand has 26 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 22 states have internal predecessors, (91), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-25 18:34:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:56,469 INFO L93 Difference]: Finished difference Result 543 states and 822 transitions. [2022-11-25 18:34:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 18:34:56,471 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 22 states have internal predecessors, (91), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 72 [2022-11-25 18:34:56,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:56,474 INFO L225 Difference]: With dead ends: 543 [2022-11-25 18:34:56,474 INFO L226 Difference]: Without dead ends: 417 [2022-11-25 18:34:56,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 82 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=531, Invalid=4152, Unknown=9, NotChecked=0, Total=4692 [2022-11-25 18:34:56,477 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1040 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 2771 mSolverCounterSat, 117 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2771 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:56,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1051 Valid, 668 Invalid, 2896 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [117 Valid, 2771 Invalid, 8 Unknown, 0 Unchecked, 5.2s Time] [2022-11-25 18:34:56,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-25 18:34:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 206. [2022-11-25 18:34:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 168 states have (on average 1.3869047619047619) internal successors, (233), 172 states have internal predecessors, (233), 23 states have call successors, (23), 12 states have call predecessors, (23), 14 states have return successors, (29), 21 states have call predecessors, (29), 22 states have call successors, (29) [2022-11-25 18:34:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 285 transitions. [2022-11-25 18:34:56,505 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 285 transitions. Word has length 72 [2022-11-25 18:34:56,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:56,505 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 285 transitions. [2022-11-25 18:34:56,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 22 states have internal predecessors, (91), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-25 18:34:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 285 transitions. [2022-11-25 18:34:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 18:34:56,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:56,508 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:56,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:56,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 18:34:56,718 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:34:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:56,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1208498679, now seen corresponding path program 1 times [2022-11-25 18:34:56,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:56,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47620018] [2022-11-25 18:34:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:56,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:58,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:34:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:58,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:34:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:58,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:34:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:58,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 18:34:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:58,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 18:34:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:58,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 18:34:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:58,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 18:34:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:58,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-25 18:34:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 18:34:58,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:58,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47620018] [2022-11-25 18:34:58,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47620018] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:58,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350216410] [2022-11-25 18:34:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:58,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:58,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:58,912 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:58,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:34:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:59,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 2587 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-25 18:34:59,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:59,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:35:00,730 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 18:35:00,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-25 18:35:01,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:35:01,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:35:01,337 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-25 18:35:01,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2022-11-25 18:35:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:35:01,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:35:01,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350216410] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:35:01,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:35:01,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-11-25 18:35:01,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960455911] [2022-11-25 18:35:01,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:35:01,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 18:35:01,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:35:01,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 18:35:01,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-11-25 18:35:01,854 INFO L87 Difference]: Start difference. First operand 206 states and 285 transitions. Second operand has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-25 18:35:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:35:07,579 INFO L93 Difference]: Finished difference Result 461 states and 686 transitions. [2022-11-25 18:35:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 18:35:07,582 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 73 [2022-11-25 18:35:07,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:35:07,585 INFO L225 Difference]: With dead ends: 461 [2022-11-25 18:35:07,585 INFO L226 Difference]: Without dead ends: 424 [2022-11-25 18:35:07,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=519, Invalid=4028, Unknown=9, NotChecked=0, Total=4556 [2022-11-25 18:35:07,588 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1032 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 84 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-25 18:35:07,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1043 Valid, 640 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2457 Invalid, 3 Unknown, 0 Unchecked, 3.8s Time] [2022-11-25 18:35:07,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-25 18:35:07,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 213. [2022-11-25 18:35:07,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 173 states have (on average 1.3815028901734103) internal successors, (239), 177 states have internal predecessors, (239), 24 states have call successors, (24), 13 states have call predecessors, (24), 15 states have return successors, (30), 22 states have call predecessors, (30), 23 states have call successors, (30) [2022-11-25 18:35:07,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 293 transitions. [2022-11-25 18:35:07,623 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 293 transitions. Word has length 73 [2022-11-25 18:35:07,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:35:07,623 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 293 transitions. [2022-11-25 18:35:07,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.875) internal successors, (93), 22 states have internal predecessors, (93), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-25 18:35:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 293 transitions. [2022-11-25 18:35:07,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 18:35:07,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:35:07,631 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:35:07,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:35:07,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:35:07,852 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:35:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:35:07,853 INFO L85 PathProgramCache]: Analyzing trace with hash -994417807, now seen corresponding path program 1 times [2022-11-25 18:35:07,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:35:07,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951761828] [2022-11-25 18:35:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:35:07,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:35:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:32,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:37:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:32,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:37:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:32,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:37:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:32,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 18:37:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:32,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 18:37:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:32,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 18:37:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:32,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 18:37:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:33,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-25 18:37:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 18:37:33,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:37:33,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951761828] [2022-11-25 18:37:33,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951761828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:37:33,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567596369] [2022-11-25 18:37:33,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:37:33,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:37:33,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:37:33,103 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:37:33,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:37:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:33,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 2598 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-25 18:37:33,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:37:34,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:37:34,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 12 [2022-11-25 18:37:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:37:34,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:37:35,038 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 18:37:35,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-11-25 18:37:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 18:37:35,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567596369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:37:35,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:37:35,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 27 [2022-11-25 18:37:35,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935488168] [2022-11-25 18:37:35,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:37:35,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 18:37:35,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:37:35,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 18:37:35,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2022-11-25 18:37:35,058 INFO L87 Difference]: Start difference. First operand 213 states and 293 transitions. Second operand has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-25 18:37:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:37:40,267 INFO L93 Difference]: Finished difference Result 488 states and 711 transitions. [2022-11-25 18:37:40,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 18:37:40,275 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) Word has length 73 [2022-11-25 18:37:40,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:37:40,278 INFO L225 Difference]: With dead ends: 488 [2022-11-25 18:37:40,279 INFO L226 Difference]: Without dead ends: 354 [2022-11-25 18:37:40,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=250, Invalid=1912, Unknown=0, NotChecked=0, Total=2162 [2022-11-25 18:37:40,282 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 543 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 3984 mSolverCounterSat, 56 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1961 SdHoareTripleChecker+Invalid, 4042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3984 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-25 18:37:40,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 1961 Invalid, 4042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3984 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-11-25 18:37:40,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-25 18:37:40,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 269. [2022-11-25 18:37:40,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 228 states have (on average 1.4429824561403508) internal successors, (329), 231 states have internal predecessors, (329), 25 states have call successors, (25), 14 states have call predecessors, (25), 15 states have return successors, (29), 23 states have call predecessors, (29), 23 states have call successors, (29) [2022-11-25 18:37:40,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 383 transitions. [2022-11-25 18:37:40,321 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 383 transitions. Word has length 73 [2022-11-25 18:37:40,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:37:40,322 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 383 transitions. [2022-11-25 18:37:40,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 4.0) internal successors, (96), 23 states have internal predecessors, (96), 12 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (21), 9 states have call predecessors, (21), 12 states have call successors, (21) [2022-11-25 18:37:40,322 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 383 transitions. [2022-11-25 18:37:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 18:37:40,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:37:40,325 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:37:40,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:37:40,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:37:40,536 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:37:40,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:37:40,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1569134765, now seen corresponding path program 1 times [2022-11-25 18:37:40,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:37:40,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732325496] [2022-11-25 18:37:40,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:37:40,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:37:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:42,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:37:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:42,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:37:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:42,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:37:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:42,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 18:37:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:42,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 18:37:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:42,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 18:37:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:42,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 18:37:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:42,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 18:37:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 18:37:42,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:37:42,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732325496] [2022-11-25 18:37:42,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732325496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:37:42,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364433093] [2022-11-25 18:37:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:37:42,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:37:42,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:37:42,933 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:37:42,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:37:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:43,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-25 18:37:43,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:37:43,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:37:45,007 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 18:37:45,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-25 18:37:45,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:37:45,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:37:45,707 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-25 18:37:45,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2022-11-25 18:37:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:37:45,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:37:46,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364433093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:37:46,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:37:46,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-11-25 18:37:46,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548000141] [2022-11-25 18:37:46,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:37:46,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 18:37:46,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:37:46,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 18:37:46,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-11-25 18:37:46,302 INFO L87 Difference]: Start difference. First operand 269 states and 383 transitions. Second operand has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-25 18:37:54,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:37:54,190 INFO L93 Difference]: Finished difference Result 461 states and 679 transitions. [2022-11-25 18:37:54,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 18:37:54,192 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 74 [2022-11-25 18:37:54,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:37:54,195 INFO L225 Difference]: With dead ends: 461 [2022-11-25 18:37:54,195 INFO L226 Difference]: Without dead ends: 355 [2022-11-25 18:37:54,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=531, Invalid=4152, Unknown=9, NotChecked=0, Total=4692 [2022-11-25 18:37:54,199 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1039 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 2921 mSolverCounterSat, 101 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 3027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2921 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-25 18:37:54,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1050 Valid, 729 Invalid, 3027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2921 Invalid, 5 Unknown, 0 Unchecked, 5.6s Time] [2022-11-25 18:37:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-25 18:37:54,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 274. [2022-11-25 18:37:54,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 233 states have (on average 1.4377682403433476) internal successors, (335), 236 states have internal predecessors, (335), 25 states have call successors, (25), 14 states have call predecessors, (25), 15 states have return successors, (29), 23 states have call predecessors, (29), 23 states have call successors, (29) [2022-11-25 18:37:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 389 transitions. [2022-11-25 18:37:54,244 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 389 transitions. Word has length 74 [2022-11-25 18:37:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:37:54,244 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 389 transitions. [2022-11-25 18:37:54,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-25 18:37:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 389 transitions. [2022-11-25 18:37:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 18:37:54,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:37:54,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:37:54,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 18:37:54,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 18:37:54,459 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:37:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:37:54,459 INFO L85 PathProgramCache]: Analyzing trace with hash -7761607, now seen corresponding path program 1 times [2022-11-25 18:37:54,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:37:54,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240293344] [2022-11-25 18:37:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:37:54,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:37:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:56,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:37:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:56,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:37:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:56,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:37:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:56,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 18:37:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:56,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 18:37:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:56,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 18:37:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:56,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 18:37:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:56,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-25 18:37:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 18:37:56,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:37:56,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240293344] [2022-11-25 18:37:56,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240293344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:37:56,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058168897] [2022-11-25 18:37:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:37:56,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:37:56,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:37:56,790 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:37:56,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:37:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:37:57,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 2595 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-25 18:37:57,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:37:57,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:37:58,866 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 18:37:58,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-25 18:37:59,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:37:59,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:37:59,535 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-25 18:37:59,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2022-11-25 18:37:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:37:59,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:38:00,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058168897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:38:00,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:38:00,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-11-25 18:38:00,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497980413] [2022-11-25 18:38:00,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:38:00,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 18:38:00,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:38:00,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 18:38:00,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-11-25 18:38:00,077 INFO L87 Difference]: Start difference. First operand 274 states and 389 transitions. Second operand has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-25 18:38:07,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:38:07,077 INFO L93 Difference]: Finished difference Result 410 states and 582 transitions. [2022-11-25 18:38:07,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 18:38:07,078 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 74 [2022-11-25 18:38:07,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:38:07,081 INFO L225 Difference]: With dead ends: 410 [2022-11-25 18:38:07,081 INFO L226 Difference]: Without dead ends: 370 [2022-11-25 18:38:07,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=521, Invalid=4026, Unknown=9, NotChecked=0, Total=4556 [2022-11-25 18:38:07,085 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 912 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 103 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-25 18:38:07,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 654 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2498 Invalid, 7 Unknown, 0 Unchecked, 4.7s Time] [2022-11-25 18:38:07,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-25 18:38:07,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 276. [2022-11-25 18:38:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 235 states have (on average 1.4340425531914893) internal successors, (337), 238 states have internal predecessors, (337), 25 states have call successors, (25), 14 states have call predecessors, (25), 15 states have return successors, (29), 23 states have call predecessors, (29), 23 states have call successors, (29) [2022-11-25 18:38:07,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 391 transitions. [2022-11-25 18:38:07,131 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 391 transitions. Word has length 74 [2022-11-25 18:38:07,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:38:07,131 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 391 transitions. [2022-11-25 18:38:07,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 22 states have internal predecessors, (95), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-25 18:38:07,132 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 391 transitions. [2022-11-25 18:38:07,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-25 18:38:07,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:38:07,135 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:38:07,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:38:07,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:38:07,348 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:38:07,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:38:07,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1464298396, now seen corresponding path program 1 times [2022-11-25 18:38:07,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:38:07,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901269678] [2022-11-25 18:38:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:38:07,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:38:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:25,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:39:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:25,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:39:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:25,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:39:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:25,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 18:39:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:25,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 18:39:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:25,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 18:39:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:25,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 18:39:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:25,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-25 18:39:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 18:39:25,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:39:25,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901269678] [2022-11-25 18:39:25,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901269678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:39:25,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282666849] [2022-11-25 18:39:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:39:25,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:39:25,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:39:25,489 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:39:25,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:39:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:26,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 2591 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-25 18:39:26,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:39:26,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:39:27,434 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 18:39:27,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-25 18:39:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:39:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:39:28,134 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-25 18:39:28,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2022-11-25 18:39:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:39:28,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:39:28,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282666849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:39:28,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:39:28,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2022-11-25 18:39:28,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028464384] [2022-11-25 18:39:28,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:39:28,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 18:39:28,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:39:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 18:39:28,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=834, Unknown=1, NotChecked=0, Total=930 [2022-11-25 18:39:28,717 INFO L87 Difference]: Start difference. First operand 276 states and 391 transitions. Second operand has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-25 18:39:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:39:35,432 INFO L93 Difference]: Finished difference Result 396 states and 567 transitions. [2022-11-25 18:39:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 18:39:35,433 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 75 [2022-11-25 18:39:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:39:35,436 INFO L225 Difference]: With dead ends: 396 [2022-11-25 18:39:35,437 INFO L226 Difference]: Without dead ends: 356 [2022-11-25 18:39:35,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=521, Invalid=4026, Unknown=9, NotChecked=0, Total=4556 [2022-11-25 18:39:35,440 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1046 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 2490 mSolverCounterSat, 131 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2490 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-25 18:39:35,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1057 Valid, 670 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2490 Invalid, 6 Unknown, 0 Unchecked, 4.4s Time] [2022-11-25 18:39:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-11-25 18:39:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 277. [2022-11-25 18:39:35,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 236 states have (on average 1.4322033898305084) internal successors, (338), 239 states have internal predecessors, (338), 25 states have call successors, (25), 14 states have call predecessors, (25), 15 states have return successors, (29), 23 states have call predecessors, (29), 23 states have call successors, (29) [2022-11-25 18:39:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 392 transitions. [2022-11-25 18:39:35,491 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 392 transitions. Word has length 75 [2022-11-25 18:39:35,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:39:35,491 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 392 transitions. [2022-11-25 18:39:35,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.041666666666667) internal successors, (97), 22 states have internal predecessors, (97), 9 states have call successors, (17), 6 states have call predecessors, (17), 8 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-25 18:39:35,492 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 392 transitions. [2022-11-25 18:39:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-25 18:39:35,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:39:35,494 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:39:35,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:39:35,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 18:39:35,695 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:39:35,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:39:35,695 INFO L85 PathProgramCache]: Analyzing trace with hash 185282190, now seen corresponding path program 1 times [2022-11-25 18:39:35,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:39:35,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088036041] [2022-11-25 18:39:35,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:39:35,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:39:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:37,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:39:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:37,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:39:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:37,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:39:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:37,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 18:39:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:37,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 18:39:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:37,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 18:39:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:37,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 18:39:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:37,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-25 18:39:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 18:39:37,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:39:37,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088036041] [2022-11-25 18:39:37,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088036041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:39:37,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180971597] [2022-11-25 18:39:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:39:37,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:39:37,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:39:37,595 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:39:37,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:39:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:38,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 2591 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-25 18:39:38,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:39:38,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:39:39,548 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 18:39:39,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2022-11-25 18:39:40,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:39:40,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:39:40,050 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-25 18:39:40,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 111 [2022-11-25 18:39:40,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-25 18:39:40,109 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-25 18:39:40,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-25 18:39:40,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-25 18:39:40,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 45 [2022-11-25 18:39:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:39:40,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:39:41,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180971597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:39:41,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:39:41,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2022-11-25 18:39:41,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25430232] [2022-11-25 18:39:41,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:39:41,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 18:39:41,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:39:41,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 18:39:41,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=998, Unknown=10, NotChecked=0, Total=1122 [2022-11-25 18:39:41,348 INFO L87 Difference]: Start difference. First operand 277 states and 392 transitions. Second operand has 29 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 24 states have internal predecessors, (100), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-25 18:39:43,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:39:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:39:53,194 INFO L93 Difference]: Finished difference Result 446 states and 624 transitions. [2022-11-25 18:39:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-25 18:39:53,195 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 24 states have internal predecessors, (100), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) Word has length 76 [2022-11-25 18:39:53,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:39:53,198 INFO L225 Difference]: With dead ends: 446 [2022-11-25 18:39:53,199 INFO L226 Difference]: Without dead ends: 394 [2022-11-25 18:39:53,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=690, Invalid=5757, Unknown=33, NotChecked=0, Total=6480 [2022-11-25 18:39:53,202 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1336 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 3413 mSolverCounterSat, 134 mSolverCounterUnsat, 135 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 3682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 3413 IncrementalHoareTripleChecker+Invalid, 135 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-25 18:39:53,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1351 Valid, 734 Invalid, 3682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 3413 Invalid, 135 Unknown, 0 Unchecked, 8.5s Time] [2022-11-25 18:39:53,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-25 18:39:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 308. [2022-11-25 18:39:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 261 states have (on average 1.4061302681992338) internal successors, (367), 264 states have internal predecessors, (367), 28 states have call successors, (28), 17 states have call predecessors, (28), 18 states have return successors, (33), 26 states have call predecessors, (33), 26 states have call successors, (33) [2022-11-25 18:39:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 428 transitions. [2022-11-25 18:39:53,269 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 428 transitions. Word has length 76 [2022-11-25 18:39:53,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:39:53,270 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 428 transitions. [2022-11-25 18:39:53,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.7037037037037037) internal successors, (100), 24 states have internal predecessors, (100), 10 states have call successors, (17), 7 states have call predecessors, (17), 8 states have return successors, (16), 8 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-25 18:39:53,271 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 428 transitions. [2022-11-25 18:39:53,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 18:39:53,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:39:53,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:39:53,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:39:53,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 18:39:53,497 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:39:53,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:39:53,498 INFO L85 PathProgramCache]: Analyzing trace with hash 105103528, now seen corresponding path program 1 times [2022-11-25 18:39:53,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:39:53,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129339637] [2022-11-25 18:39:53,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:39:53,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:39:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:54,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:39:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:54,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:39:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:54,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:39:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:54,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-11-25 18:39:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:54,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 18:39:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:54,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 18:39:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:54,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 18:39:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:54,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-25 18:39:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-25 18:39:54,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:39:54,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129339637] [2022-11-25 18:39:54,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129339637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:39:54,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158289942] [2022-11-25 18:39:54,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:39:54,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:39:54,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:39:54,670 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:39:54,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:39:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:55,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 2609 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 18:39:55,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:39:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 18:39:55,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:39:55,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158289942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:39:55,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:39:55,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 12 [2022-11-25 18:39:55,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960370329] [2022-11-25 18:39:55,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:39:55,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:39:55,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:39:55,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:39:55,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:39:55,523 INFO L87 Difference]: Start difference. First operand 308 states and 428 transitions. Second operand has 10 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-25 18:39:55,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:39:55,721 INFO L93 Difference]: Finished difference Result 531 states and 756 transitions. [2022-11-25 18:39:55,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:39:55,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 80 [2022-11-25 18:39:55,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:39:55,724 INFO L225 Difference]: With dead ends: 531 [2022-11-25 18:39:55,724 INFO L226 Difference]: Without dead ends: 318 [2022-11-25 18:39:55,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:39:55,726 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 13 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1601 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:39:55,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1601 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:39:55,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-25 18:39:55,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 308. [2022-11-25 18:39:55,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 261 states have (on average 1.4022988505747127) internal successors, (366), 264 states have internal predecessors, (366), 28 states have call successors, (28), 17 states have call predecessors, (28), 18 states have return successors, (33), 26 states have call predecessors, (33), 26 states have call successors, (33) [2022-11-25 18:39:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 427 transitions. [2022-11-25 18:39:55,777 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 427 transitions. Word has length 80 [2022-11-25 18:39:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:39:55,777 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 427 transitions. [2022-11-25 18:39:55,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-25 18:39:55,778 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 427 transitions. [2022-11-25 18:39:55,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 18:39:55,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:39:55,780 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:39:55,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 18:39:56,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:39:56,001 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:39:56,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:39:56,002 INFO L85 PathProgramCache]: Analyzing trace with hash -945604398, now seen corresponding path program 1 times [2022-11-25 18:39:56,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:39:56,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788652176] [2022-11-25 18:39:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:39:56,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:39:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:57,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:39:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:57,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:39:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:57,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:39:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:57,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 18:39:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:57,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 18:39:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:57,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 18:39:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:57,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-25 18:39:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:57,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-25 18:39:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 18:39:57,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:39:57,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788652176] [2022-11-25 18:39:57,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788652176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:39:57,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439772561] [2022-11-25 18:39:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:39:57,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:39:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:39:57,816 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:39:57,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 18:39:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:39:58,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 2610 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:39:58,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:39:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 18:39:58,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:39:58,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439772561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:39:58,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:39:58,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2022-11-25 18:39:58,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605481643] [2022-11-25 18:39:58,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:39:58,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:39:58,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:39:58,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:39:58,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:39:58,736 INFO L87 Difference]: Start difference. First operand 308 states and 427 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 18:39:59,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:39:59,676 INFO L93 Difference]: Finished difference Result 521 states and 745 transitions. [2022-11-25 18:39:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:39:59,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2022-11-25 18:39:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:39:59,680 INFO L225 Difference]: With dead ends: 521 [2022-11-25 18:39:59,680 INFO L226 Difference]: Without dead ends: 308 [2022-11-25 18:39:59,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:39:59,682 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 19 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 18:39:59,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 544 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 18:39:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-25 18:39:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-11-25 18:39:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 261 states have (on average 1.3908045977011494) internal successors, (363), 264 states have internal predecessors, (363), 28 states have call successors, (28), 17 states have call predecessors, (28), 18 states have return successors, (33), 26 states have call predecessors, (33), 26 states have call successors, (33) [2022-11-25 18:39:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 424 transitions. [2022-11-25 18:39:59,728 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 424 transitions. Word has length 83 [2022-11-25 18:39:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:39:59,728 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 424 transitions. [2022-11-25 18:39:59,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 18:39:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 424 transitions. [2022-11-25 18:39:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 18:39:59,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:39:59,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:39:59,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:39:59,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 18:39:59,943 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:39:59,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:39:59,944 INFO L85 PathProgramCache]: Analyzing trace with hash -743780464, now seen corresponding path program 1 times [2022-11-25 18:39:59,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:39:59,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109599400] [2022-11-25 18:39:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:39:59,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:40:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:13,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:42:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:13,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:42:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:13,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:42:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:13,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 18:42:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:13,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 18:42:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:13,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 18:42:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:13,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-25 18:42:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:13,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-25 18:42:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 18:42:13,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:42:13,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109599400] [2022-11-25 18:42:13,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109599400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:42:13,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174049053] [2022-11-25 18:42:13,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:42:13,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:42:13,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:42:13,815 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:42:13,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 18:42:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:14,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 2615 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 18:42:14,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:42:14,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 18:42:14,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 18:42:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 18:42:15,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:42:15,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174049053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:42:15,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:42:15,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 21 [2022-11-25 18:42:15,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369345669] [2022-11-25 18:42:15,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:42:15,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:42:15,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:42:15,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:42:15,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-25 18:42:15,427 INFO L87 Difference]: Start difference. First operand 308 states and 424 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-25 18:42:16,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:42:16,486 INFO L93 Difference]: Finished difference Result 693 states and 1002 transitions. [2022-11-25 18:42:16,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:42:16,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 83 [2022-11-25 18:42:16,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:42:16,490 INFO L225 Difference]: With dead ends: 693 [2022-11-25 18:42:16,490 INFO L226 Difference]: Without dead ends: 486 [2022-11-25 18:42:16,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-11-25 18:42:16,492 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 171 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 18:42:16,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 828 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 18:42:16,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-11-25 18:42:16,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 347. [2022-11-25 18:42:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 291 states have (on average 1.3573883161512028) internal successors, (395), 296 states have internal predecessors, (395), 32 states have call successors, (32), 20 states have call predecessors, (32), 23 states have return successors, (39), 30 states have call predecessors, (39), 30 states have call successors, (39) [2022-11-25 18:42:16,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 466 transitions. [2022-11-25 18:42:16,541 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 466 transitions. Word has length 83 [2022-11-25 18:42:16,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:42:16,542 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 466 transitions. [2022-11-25 18:42:16,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-25 18:42:16,542 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 466 transitions. [2022-11-25 18:42:16,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-25 18:42:16,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:42:16,545 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:42:16,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 18:42:16,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:42:16,756 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:42:16,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:42:16,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1161177070, now seen corresponding path program 1 times [2022-11-25 18:42:16,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:42:16,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841825725] [2022-11-25 18:42:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:42:16,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:42:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:17,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:42:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:17,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:42:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:17,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:42:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:17,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 18:42:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:17,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 18:42:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:17,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 18:42:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:17,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-25 18:42:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:17,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-25 18:42:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 18:42:17,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:42:17,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841825725] [2022-11-25 18:42:17,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841825725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:42:17,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891599302] [2022-11-25 18:42:17,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:42:17,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:42:17,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:42:17,204 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:42:17,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 18:42:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:42:17,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 2610 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:42:17,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:42:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-25 18:42:17,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:42:17,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891599302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:42:17,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:42:17,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-25 18:42:17,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054084226] [2022-11-25 18:42:17,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:42:17,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:42:17,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:42:17,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:42:17,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:42:17,888 INFO L87 Difference]: Start difference. First operand 347 states and 466 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 18:42:17,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:42:17,954 INFO L93 Difference]: Finished difference Result 598 states and 821 transitions. [2022-11-25 18:42:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:42:17,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2022-11-25 18:42:17,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:42:17,957 INFO L225 Difference]: With dead ends: 598 [2022-11-25 18:42:17,957 INFO L226 Difference]: Without dead ends: 335 [2022-11-25 18:42:17,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:42:17,959 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 6 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:42:17,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 546 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:42:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-11-25 18:42:18,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 323. [2022-11-25 18:42:18,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 274 states have (on average 1.3686131386861313) internal successors, (375), 277 states have internal predecessors, (375), 28 states have call successors, (28), 19 states have call predecessors, (28), 20 states have return successors, (32), 26 states have call predecessors, (32), 26 states have call successors, (32) [2022-11-25 18:42:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 435 transitions. [2022-11-25 18:42:18,004 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 435 transitions. Word has length 83 [2022-11-25 18:42:18,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:42:18,005 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 435 transitions. [2022-11-25 18:42:18,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 18:42:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 435 transitions. [2022-11-25 18:42:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-25 18:42:18,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:42:18,007 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:42:18,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 18:42:18,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 18:42:18,218 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:42:18,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:42:18,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1287439073, now seen corresponding path program 1 times [2022-11-25 18:42:18,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:42:18,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990179564] [2022-11-25 18:42:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:42:18,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:42:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:45,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:47:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:45,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:47:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:45,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 18:47:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:45,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 18:47:45,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:45,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-11-25 18:47:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:45,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 18:47:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:45,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 18:47:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:45,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-11-25 18:47:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:45,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-25 18:47:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:45,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-25 18:47:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 18:47:45,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:47:45,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990179564] [2022-11-25 18:47:45,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990179564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:47:45,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676806375] [2022-11-25 18:47:45,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:47:45,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:47:45,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:47:45,602 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:47:45,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 18:47:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:46,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 18:47:46,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:47:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 18:47:46,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:47:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-25 18:47:46,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676806375] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:47:46,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:47:46,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12, 11] total 25 [2022-11-25 18:47:46,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183866391] [2022-11-25 18:47:46,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:47:46,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:47:46,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:47:46,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:47:46,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2022-11-25 18:47:46,773 INFO L87 Difference]: Start difference. First operand 323 states and 435 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-25 18:47:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:47:46,908 INFO L93 Difference]: Finished difference Result 328 states and 439 transitions. [2022-11-25 18:47:46,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:47:46,909 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 88 [2022-11-25 18:47:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:47:46,910 INFO L225 Difference]: With dead ends: 328 [2022-11-25 18:47:46,911 INFO L226 Difference]: Without dead ends: 323 [2022-11-25 18:47:46,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2022-11-25 18:47:46,912 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 13 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:47:46,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1252 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:47:46,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-11-25 18:47:46,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2022-11-25 18:47:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 274 states have (on average 1.3686131386861313) internal successors, (375), 277 states have internal predecessors, (375), 28 states have call successors, (28), 19 states have call predecessors, (28), 20 states have return successors, (30), 26 states have call predecessors, (30), 26 states have call successors, (30) [2022-11-25 18:47:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 433 transitions. [2022-11-25 18:47:46,962 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 433 transitions. Word has length 88 [2022-11-25 18:47:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:47:46,963 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 433 transitions. [2022-11-25 18:47:46,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-25 18:47:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 433 transitions. [2022-11-25 18:47:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-25 18:47:46,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:47:46,965 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:47:46,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 18:47:47,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 18:47:47,176 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:47:47,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:47:47,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1806460600, now seen corresponding path program 1 times [2022-11-25 18:47:47,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:47:47,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032333299] [2022-11-25 18:47:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:47:47,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:47:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:49,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-25 18:47:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:49,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 18:47:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:49,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 18:47:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:49,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 18:47:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:49,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 18:47:49,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:49,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-25 18:47:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:49,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 18:47:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:49,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 18:47:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:49,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-11-25 18:47:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:49,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-11-25 18:47:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 18:47:49,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:47:49,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032333299] [2022-11-25 18:47:49,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032333299] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:47:49,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973850479] [2022-11-25 18:47:49,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:47:49,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:47:49,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:47:49,496 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:47:49,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08846378-1f92-4187-a92c-65cf39bc3cc4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 18:47:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:47:50,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 2630 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-25 18:47:50,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:47:50,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 18:47:51,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:47:51,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 34 [2022-11-25 18:47:59,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-25 18:47:59,697 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:47:59,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 26 [2022-11-25 18:48:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 18:48:00,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:48:00,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973850479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:48:00,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:48:00,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [15] total 34 [2022-11-25 18:48:00,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018932656] [2022-11-25 18:48:00,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:48:00,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 18:48:00,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:48:00,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 18:48:00,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1024, Unknown=6, NotChecked=0, Total=1122 [2022-11-25 18:48:00,212 INFO L87 Difference]: Start difference. First operand 323 states and 433 transitions. Second operand has 21 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 8 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-25 18:48:03,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:48:06,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:48:08,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:48:10,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:48:12,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:48:14,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 18:48:16,428 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]