./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/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_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/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_f026ba6a-867a-4fb6-8331-8b4eaed02b26/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 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d --- 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 15:33:03,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:33:03,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:33:04,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:33:04,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:33:04,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:33:04,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:33:04,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:33:04,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:33:04,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:33:04,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:33:04,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:33:04,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:33:04,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:33:04,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:33:04,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:33:04,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:33:04,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:33:04,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:33:04,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:33:04,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:33:04,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:33:04,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:33:04,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:33:04,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:33:04,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:33:04,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:33:04,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:33:04,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:33:04,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:33:04,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:33:04,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:33:04,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:33:04,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:33:04,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:33:04,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:33:04,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:33:04,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:33:04,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:33:04,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:33:04,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:33:04,076 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-25 15:33:04,103 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:33:04,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:33:04,104 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:33:04,104 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:33:04,105 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:33:04,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:33:04,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:33:04,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:33:04,106 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:33:04,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:33:04,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:33:04,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:33:04,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:33:04,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:33:04,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:33:04,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:33:04,122 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:33:04,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:33:04,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:33:04,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:33:04,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:33:04,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:33:04,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:33:04,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:33:04,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:33:04,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:33:04,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:33:04,125 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:33:04,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:33:04,126 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:33:04,126 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:33:04,126 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_f026ba6a-867a-4fb6-8331-8b4eaed02b26/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d [2022-11-25 15:33:04,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:33:04,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:33:04,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:33:04,410 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:33:04,411 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:33:04,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2022-11-25 15:33:07,415 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:33:07,971 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:33:07,972 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2022-11-25 15:33:08,001 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/data/74cbeaadf/1942e90b069643b3b9e7b361394e819f/FLAG1def33ad8 [2022-11-25 15:33:08,017 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/data/74cbeaadf/1942e90b069643b3b9e7b361394e819f [2022-11-25 15:33:08,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:33:08,023 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:33:08,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:33:08,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:33:08,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:33:08,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:33:08" (1/1) ... [2022-11-25 15:33:08,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@126411aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:08, skipping insertion in model container [2022-11-25 15:33:08,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:33:08" (1/1) ... [2022-11-25 15:33:08,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:33:08,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:33:08,414 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_f026ba6a-867a-4fb6-8331-8b4eaed02b26/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2022-11-25 15:33:08,424 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_f026ba6a-867a-4fb6-8331-8b4eaed02b26/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2022-11-25 15:33:09,433 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:09,449 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:09,451 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:09,457 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:09,458 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:09,458 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:09,459 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:09,461 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:09,464 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:09,467 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:09,476 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:09,477 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:09,477 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:09,479 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:09,480 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:09,575 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 15:33:09,576 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 15:33:09,577 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 15:33:09,582 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 15:33:09,585 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 15:33:09,585 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 15:33:09,755 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:09,907 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 15:33:09,909 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 15:33:09,910 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 15:33:09,911 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 15:33:09,912 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 15:33:09,914 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 15:33:09,915 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 15:33:09,916 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 15:33:09,916 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 15:33:09,917 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 15:33:09,918 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 15:33:10,111 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 15:33:10,151 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,152 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,170 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,174 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,175 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,193 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,201 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,207 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,209 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,210 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-25 15:33:10,236 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 15:33:10,248 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,265 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,281 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,283 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,295 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 15:33:10,312 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,319 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,332 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,347 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,352 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,378 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,411 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 15:33:10,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:33:10,480 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:33:10,504 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_f026ba6a-867a-4fb6-8331-8b4eaed02b26/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2022-11-25 15:33:10,505 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_f026ba6a-867a-4fb6-8331-8b4eaed02b26/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2022-11-25 15:33:10,538 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,546 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,547 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,549 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,550 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,551 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,552 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,554 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,556 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,557 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,568 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,568 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,570 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,571 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,572 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,583 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 15:33:10,584 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 15:33:10,584 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 15:33:10,589 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 15:33:10,591 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 15:33:10,592 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 15:33:10,595 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,623 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 15:33:10,624 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 15:33:10,625 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 15:33:10,626 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 15:33:10,628 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 15:33:10,629 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 15:33:10,630 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 15:33:10,631 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 15:33:10,631 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 15:33:10,633 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 15:33:10,634 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 15:33:10,671 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 15:33:10,680 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,681 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,684 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,687 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,688 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,702 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,704 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,706 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,707 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,708 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-25 15:33:10,715 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 15:33:10,729 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,734 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,734 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,735 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,745 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 15:33:10,752 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,752 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 15:33:10,756 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,761 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,762 WARN L623 FunctionHandler]: Unknown extern function my_memcpy [2022-11-25 15:33:10,766 WARN L623 FunctionHandler]: Unknown extern function my_memset [2022-11-25 15:33:10,790 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 15:33:10,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:33:10,991 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:33:10,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:10 WrapperNode [2022-11-25 15:33:10,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:33:10,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:33:10,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:33:10,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:33:10,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:10" (1/1) ... [2022-11-25 15:33:11,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:10" (1/1) ... [2022-11-25 15:33:11,149 INFO L138 Inliner]: procedures = 692, calls = 2499, calls flagged for inlining = 57, calls inlined = 12, statements flattened = 1002 [2022-11-25 15:33:11,149 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:33:11,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:33:11,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:33:11,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:33:11,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:10" (1/1) ... [2022-11-25 15:33:11,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:10" (1/1) ... [2022-11-25 15:33:11,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:10" (1/1) ... [2022-11-25 15:33:11,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:10" (1/1) ... [2022-11-25 15:33:11,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:10" (1/1) ... [2022-11-25 15:33:11,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:10" (1/1) ... [2022-11-25 15:33:11,255 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:10" (1/1) ... [2022-11-25 15:33:11,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:10" (1/1) ... [2022-11-25 15:33:11,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:33:11,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:33:11,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:33:11,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:33:11,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:10" (1/1) ... [2022-11-25 15:33:11,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:33:11,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:11,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:33:11,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:33:11,367 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-25 15:33:11,368 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-25 15:33:11,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:33:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-25 15:33:11,371 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-25 15:33:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:33:11,371 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-25 15:33:11,371 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-25 15:33:11,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 15:33:11,372 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 15:33:11,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 15:33:11,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:33:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 15:33:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:33:11,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:33:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-25 15:33:11,378 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-25 15:33:11,378 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2022-11-25 15:33:11,378 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2022-11-25 15:33:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-11-25 15:33:11,379 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-11-25 15:33:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 15:33:11,379 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 15:33:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:33:11,379 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2022-11-25 15:33:11,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2022-11-25 15:33:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 15:33:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 15:33:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-25 15:33:11,380 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-25 15:33:11,380 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2022-11-25 15:33:11,380 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2022-11-25 15:33:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:33:11,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:33:11,764 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:33:11,766 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:33:13,329 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:33:13,343 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:33:13,344 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-25 15:33:13,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:33:13 BoogieIcfgContainer [2022-11-25 15:33:13,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:33:13,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:33:13,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:33:13,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:33:13,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:33:08" (1/3) ... [2022-11-25 15:33:13,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1959d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:33:13, skipping insertion in model container [2022-11-25 15:33:13,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:33:10" (2/3) ... [2022-11-25 15:33:13,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1959d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:33:13, skipping insertion in model container [2022-11-25 15:33:13,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:33:13" (3/3) ... [2022-11-25 15:33:13,358 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_relative_harness.i [2022-11-25 15:33:13,377 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:33:13,377 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:33:13,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:33:13,458 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;@2ecdf666, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:33:13,458 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 15:33:13,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 110 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-25 15:33:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 15:33:13,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:33:13,476 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 15:33:13,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:33:13,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:13,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1108355223, now seen corresponding path program 1 times [2022-11-25 15:33:13,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:13,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434272766] [2022-11-25 15:33:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:13,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:14,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:33:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:14,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:33:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:14,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:33:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:14,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:33:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:14,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 15:33:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:14,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 15:33:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:33:14,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:14,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434272766] [2022-11-25 15:33:14,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434272766] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:14,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:14,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:33:14,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60461475] [2022-11-25 15:33:14,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:14,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:33:14,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:14,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:33:14,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:33:14,248 INFO L87 Difference]: Start difference. First operand has 160 states, 111 states have (on average 1.3153153153153154) internal successors, (146), 110 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:33:14,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:33:14,738 INFO L93 Difference]: Finished difference Result 320 states and 455 transitions. [2022-11-25 15:33:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:33:14,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-11-25 15:33:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:33:14,752 INFO L225 Difference]: With dead ends: 320 [2022-11-25 15:33:14,752 INFO L226 Difference]: Without dead ends: 165 [2022-11-25 15:33:14,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 15:33:14,760 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 128 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 15:33:14,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 268 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 15:33:14,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-25 15:33:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 155. [2022-11-25 15:33:14,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 105 states have (on average 1.2571428571428571) internal successors, (132), 106 states have internal predecessors, (132), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-25 15:33:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 207 transitions. [2022-11-25 15:33:14,821 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 207 transitions. Word has length 46 [2022-11-25 15:33:14,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:33:14,823 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 207 transitions. [2022-11-25 15:33:14,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:33:14,824 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 207 transitions. [2022-11-25 15:33:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 15:33:14,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:33:14,826 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 15:33:14,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:33:14,827 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:33:14,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:14,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1165194515, now seen corresponding path program 1 times [2022-11-25 15:33:14,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:14,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905717457] [2022-11-25 15:33:14,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:14,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:15,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:33:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:15,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:33:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:15,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:33:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:15,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:33:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:15,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 15:33:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:15,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 15:33:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:33:15,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:15,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905717457] [2022-11-25 15:33:15,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905717457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:15,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:15,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:33:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984263609] [2022-11-25 15:33:15,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:15,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:33:15,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:15,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:33:15,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:33:15,649 INFO L87 Difference]: Start difference. First operand 155 states and 207 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 15:33:16,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:33:16,352 INFO L93 Difference]: Finished difference Result 307 states and 413 transitions. [2022-11-25 15:33:16,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:33:16,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-11-25 15:33:16,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:33:16,355 INFO L225 Difference]: With dead ends: 307 [2022-11-25 15:33:16,356 INFO L226 Difference]: Without dead ends: 168 [2022-11-25 15:33:16,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:33:16,357 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 205 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:33:16,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 460 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 15:33:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-25 15:33:16,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2022-11-25 15:33:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 107 states have (on average 1.2523364485981308) internal successors, (134), 109 states have internal predecessors, (134), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-11-25 15:33:16,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 215 transitions. [2022-11-25 15:33:16,382 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 215 transitions. Word has length 46 [2022-11-25 15:33:16,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:33:16,382 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 215 transitions. [2022-11-25 15:33:16,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 15:33:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 215 transitions. [2022-11-25 15:33:16,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 15:33:16,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:33:16,385 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-25 15:33:16,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:33:16,385 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:33:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:16,386 INFO L85 PathProgramCache]: Analyzing trace with hash 862482782, now seen corresponding path program 1 times [2022-11-25 15:33:16,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:16,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593988764] [2022-11-25 15:33:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:16,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:16,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:33:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:16,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:33:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:16,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:33:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:16,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:33:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:16,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 15:33:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:16,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-25 15:33:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:33:16,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:16,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593988764] [2022-11-25 15:33:16,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593988764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:16,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:16,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 15:33:16,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263340982] [2022-11-25 15:33:16,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:16,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 15:33:16,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:16,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:33:16,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:33:16,911 INFO L87 Difference]: Start difference. First operand 158 states and 215 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 15:33:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:33:17,596 INFO L93 Difference]: Finished difference Result 210 states and 276 transitions. [2022-11-25 15:33:17,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:33:17,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2022-11-25 15:33:17,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:33:17,599 INFO L225 Difference]: With dead ends: 210 [2022-11-25 15:33:17,599 INFO L226 Difference]: Without dead ends: 172 [2022-11-25 15:33:17,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:33:17,601 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 131 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:33:17,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 634 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 15:33:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-25 15:33:17,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2022-11-25 15:33:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 111 states have internal predecessors, (136), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-11-25 15:33:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2022-11-25 15:33:17,632 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 52 [2022-11-25 15:33:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:33:17,633 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2022-11-25 15:33:17,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 15:33:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2022-11-25 15:33:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-25 15:33:17,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:33:17,643 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:17,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:33:17,644 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:33:17,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:17,645 INFO L85 PathProgramCache]: Analyzing trace with hash 877723525, now seen corresponding path program 1 times [2022-11-25 15:33:17,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:17,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506037043] [2022-11-25 15:33:17,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:17,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:18,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:33:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:18,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:33:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:18,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:33:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:18,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:33:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:18,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 15:33:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:18,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-25 15:33:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:18,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-25 15:33:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:33:18,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:18,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506037043] [2022-11-25 15:33:18,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506037043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:18,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415997726] [2022-11-25 15:33:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:18,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:18,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:18,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:18,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:33:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:19,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 2467 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 15:33:19,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 15:33:19,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:33:19,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415997726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:19,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:33:19,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2022-11-25 15:33:19,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912881722] [2022-11-25 15:33:19,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:19,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:33:19,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:19,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:33:19,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-25 15:33:19,721 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 15:33:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:33:19,793 INFO L93 Difference]: Finished difference Result 204 states and 270 transitions. [2022-11-25 15:33:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:33:19,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 60 [2022-11-25 15:33:19,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:33:19,796 INFO L225 Difference]: With dead ends: 204 [2022-11-25 15:33:19,797 INFO L226 Difference]: Without dead ends: 166 [2022-11-25 15:33:19,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:33:19,798 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 3 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:33:19,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1024 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:33:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-25 15:33:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2022-11-25 15:33:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 111 states have internal predecessors, (136), 38 states have call successors, (38), 11 states have call predecessors, (38), 12 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-11-25 15:33:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2022-11-25 15:33:19,817 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 60 [2022-11-25 15:33:19,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:33:19,817 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2022-11-25 15:33:19,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 15:33:19,818 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2022-11-25 15:33:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-25 15:33:19,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:33:19,819 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:19,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 15:33:20,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:20,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:33:20,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:20,035 INFO L85 PathProgramCache]: Analyzing trace with hash -268177860, now seen corresponding path program 1 times [2022-11-25 15:33:20,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:20,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535679905] [2022-11-25 15:33:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:20,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:20,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:33:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:20,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:33:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:20,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:33:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:20,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:33:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:20,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 15:33:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:20,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-25 15:33:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:20,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-25 15:33:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 15:33:20,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:20,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535679905] [2022-11-25 15:33:20,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535679905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:20,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:20,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 15:33:20,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316008541] [2022-11-25 15:33:20,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:20,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:33:20,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:20,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:33:20,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:33:20,961 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 15:33:21,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:33:21,814 INFO L93 Difference]: Finished difference Result 181 states and 244 transitions. [2022-11-25 15:33:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 15:33:21,815 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 64 [2022-11-25 15:33:21,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:33:21,817 INFO L225 Difference]: With dead ends: 181 [2022-11-25 15:33:21,817 INFO L226 Difference]: Without dead ends: 174 [2022-11-25 15:33:21,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-25 15:33:21,818 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 153 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 15:33:21,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 855 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 15:33:21,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-25 15:33:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2022-11-25 15:33:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 38 states have call successors, (38), 11 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2022-11-25 15:33:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 227 transitions. [2022-11-25 15:33:21,832 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 227 transitions. Word has length 64 [2022-11-25 15:33:21,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:33:21,832 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 227 transitions. [2022-11-25 15:33:21,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 15:33:21,833 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 227 transitions. [2022-11-25 15:33:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 15:33:21,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:33:21,834 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:21,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:33:21,834 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:33:21,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:21,835 INFO L85 PathProgramCache]: Analyzing trace with hash 7549444, now seen corresponding path program 1 times [2022-11-25 15:33:21,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:21,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468432861] [2022-11-25 15:33:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:21,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:22,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:33:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:22,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:33:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:22,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:33:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:22,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:33:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:22,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 15:33:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:22,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-25 15:33:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:22,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-25 15:33:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:33:22,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:22,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468432861] [2022-11-25 15:33:22,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468432861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:22,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:33:22,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:33:22,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377571042] [2022-11-25 15:33:22,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:22,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:33:22,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:22,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:33:22,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:33:22,753 INFO L87 Difference]: Start difference. First operand 164 states and 227 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 15:33:23,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:33:23,449 INFO L93 Difference]: Finished difference Result 347 states and 495 transitions. [2022-11-25 15:33:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 15:33:23,450 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 68 [2022-11-25 15:33:23,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:33:23,452 INFO L225 Difference]: With dead ends: 347 [2022-11-25 15:33:23,452 INFO L226 Difference]: Without dead ends: 199 [2022-11-25 15:33:23,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:33:23,454 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 220 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:33:23,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 451 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 15:33:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-25 15:33:23,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 169. [2022-11-25 15:33:23,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 120 states have internal predecessors, (146), 38 states have call successors, (38), 11 states have call predecessors, (38), 13 states have return successors, (50), 37 states have call predecessors, (50), 37 states have call successors, (50) [2022-11-25 15:33:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 234 transitions. [2022-11-25 15:33:23,468 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 234 transitions. Word has length 68 [2022-11-25 15:33:23,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:33:23,469 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 234 transitions. [2022-11-25 15:33:23,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 15:33:23,469 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 234 transitions. [2022-11-25 15:33:23,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 15:33:23,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:33:23,470 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:23,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:33:23,471 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:33:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:23,472 INFO L85 PathProgramCache]: Analyzing trace with hash 265714882, now seen corresponding path program 1 times [2022-11-25 15:33:23,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:23,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58380798] [2022-11-25 15:33:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:23,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:25,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:33:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:25,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:33:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:25,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:33:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:25,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:33:25,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:25,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 15:33:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:25,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-25 15:33:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:25,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-25 15:33:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:33:25,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:25,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58380798] [2022-11-25 15:33:25,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58380798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:25,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993151439] [2022-11-25 15:33:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:25,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:25,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:25,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:25,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:33:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:26,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 15:33:26,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:26,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 15:33:26,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:33:26,632 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-25 15:33:26,632 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 24 treesize of output 1 [2022-11-25 15:33:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:26,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:33:26,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993151439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:26,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:33:26,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 17 [2022-11-25 15:33:26,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451953944] [2022-11-25 15:33:26,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:26,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 15:33:26,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:26,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 15:33:26,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:33:26,640 INFO L87 Difference]: Start difference. First operand 169 states and 234 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-25 15:33:29,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:33:32,085 WARN L539 Checker$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 15:33:34,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:33:36,139 WARN L539 Checker$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 15:33:38,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:33:40,404 WARN L539 Checker$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 15:33:42,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:33:44,527 WARN L539 Checker$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 15:33:46,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:33:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:33:46,628 INFO L93 Difference]: Finished difference Result 454 states and 625 transitions. [2022-11-25 15:33:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:33:46,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 68 [2022-11-25 15:33:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:33:46,631 INFO L225 Difference]: With dead ends: 454 [2022-11-25 15:33:46,631 INFO L226 Difference]: Without dead ends: 301 [2022-11-25 15:33:46,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-11-25 15:33:46,633 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 232 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 74 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2022-11-25 15:33:46,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1858 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 757 Invalid, 9 Unknown, 0 Unchecked, 19.7s Time] [2022-11-25 15:33:46,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-25 15:33:46,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 288. [2022-11-25 15:33:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 203 states have (on average 1.2660098522167487) internal successors, (257), 208 states have internal predecessors, (257), 62 states have call successors, (62), 19 states have call predecessors, (62), 22 states have return successors, (72), 60 states have call predecessors, (72), 60 states have call successors, (72) [2022-11-25 15:33:46,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 391 transitions. [2022-11-25 15:33:46,664 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 391 transitions. Word has length 68 [2022-11-25 15:33:46,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:33:46,664 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 391 transitions. [2022-11-25 15:33:46,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 9 states have internal predecessors, (53), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-25 15:33:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 391 transitions. [2022-11-25 15:33:46,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-25 15:33:46,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:33:46,666 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:46,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:46,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:46,876 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:33:46,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:46,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1530819000, now seen corresponding path program 1 times [2022-11-25 15:33:46,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:46,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821595733] [2022-11-25 15:33:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:46,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:47,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:33:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:47,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:33:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:47,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:33:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:47,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:33:47,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:47,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 15:33:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:47,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 15:33:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:47,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:33:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 15:33:47,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:47,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821595733] [2022-11-25 15:33:47,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821595733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:47,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418987352] [2022-11-25 15:33:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:47,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:47,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:47,899 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:47,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:33:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:48,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 2493 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:33:48,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:33:48,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:33:48,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418987352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:48,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:33:48,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 12 [2022-11-25 15:33:48,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788941546] [2022-11-25 15:33:48,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:48,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:33:48,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:48,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:33:48,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:33:48,564 INFO L87 Difference]: Start difference. First operand 288 states and 391 transitions. Second operand has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 15:33:48,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:33:48,760 INFO L93 Difference]: Finished difference Result 576 states and 796 transitions. [2022-11-25 15:33:48,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 15:33:48,760 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 72 [2022-11-25 15:33:48,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:33:48,764 INFO L225 Difference]: With dead ends: 576 [2022-11-25 15:33:48,764 INFO L226 Difference]: Without dead ends: 304 [2022-11-25 15:33:48,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:33:48,766 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 13 mSDsluCounter, 1326 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:33:48,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1523 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:33:48,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-11-25 15:33:48,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 293. [2022-11-25 15:33:48,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 207 states have (on average 1.2608695652173914) internal successors, (261), 213 states have internal predecessors, (261), 62 states have call successors, (62), 19 states have call predecessors, (62), 23 states have return successors, (78), 60 states have call predecessors, (78), 60 states have call successors, (78) [2022-11-25 15:33:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 401 transitions. [2022-11-25 15:33:48,808 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 401 transitions. Word has length 72 [2022-11-25 15:33:48,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:33:48,808 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 401 transitions. [2022-11-25 15:33:48,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 15:33:48,809 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 401 transitions. [2022-11-25 15:33:48,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 15:33:48,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:33:48,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:48,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:49,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 15:33:49,025 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:33:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:49,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1019185037, now seen corresponding path program 1 times [2022-11-25 15:33:49,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:49,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202743118] [2022-11-25 15:33:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:49,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:49,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:33:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:49,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:33:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:49,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:33:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:49,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:33:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:49,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 15:33:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:49,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 15:33:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:49,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-25 15:33:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 15:33:49,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:49,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202743118] [2022-11-25 15:33:49,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202743118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:49,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195859454] [2022-11-25 15:33:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:49,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:49,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:49,384 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:49,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:33:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 2498 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:33:49,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:33:49,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:33:49,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195859454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:49,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:33:49,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-11-25 15:33:49,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855899035] [2022-11-25 15:33:49,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:49,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:33:49,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:49,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:33:49,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:33:49,953 INFO L87 Difference]: Start difference. First operand 293 states and 401 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 15:33:50,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:33:50,009 INFO L93 Difference]: Finished difference Result 583 states and 809 transitions. [2022-11-25 15:33:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:33:50,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2022-11-25 15:33:50,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:33:50,012 INFO L225 Difference]: With dead ends: 583 [2022-11-25 15:33:50,013 INFO L226 Difference]: Without dead ends: 306 [2022-11-25 15:33:50,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:33:50,017 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 9 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:33:50,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 609 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:33:50,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-11-25 15:33:50,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 297. [2022-11-25 15:33:50,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 211 states have (on average 1.2559241706161137) internal successors, (265), 217 states have internal predecessors, (265), 62 states have call successors, (62), 19 states have call predecessors, (62), 23 states have return successors, (78), 60 states have call predecessors, (78), 60 states have call successors, (78) [2022-11-25 15:33:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 405 transitions. [2022-11-25 15:33:50,047 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 405 transitions. Word has length 74 [2022-11-25 15:33:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:33:50,049 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 405 transitions. [2022-11-25 15:33:50,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 15:33:50,049 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 405 transitions. [2022-11-25 15:33:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 15:33:50,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:33:50,051 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:50,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:50,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:50,265 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:33:50,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:50,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1357293521, now seen corresponding path program 1 times [2022-11-25 15:33:50,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:50,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660317622] [2022-11-25 15:33:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:50,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:50,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:33:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:50,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:33:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:50,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:33:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:50,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:33:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:50,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 15:33:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:50,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 15:33:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:50,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-25 15:33:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 15:33:50,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:50,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660317622] [2022-11-25 15:33:50,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660317622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:50,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031296299] [2022-11-25 15:33:50,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:50,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:50,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:50,604 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:50,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:33:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:51,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 2500 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:33:51,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:33:51,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:33:51,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031296299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:33:51,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:33:51,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-11-25 15:33:51,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877290560] [2022-11-25 15:33:51,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:33:51,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:33:51,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:51,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:33:51,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:33:51,134 INFO L87 Difference]: Start difference. First operand 297 states and 405 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 15:33:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:33:51,180 INFO L93 Difference]: Finished difference Result 612 states and 854 transitions. [2022-11-25 15:33:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:33:51,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2022-11-25 15:33:51,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:33:51,183 INFO L225 Difference]: With dead ends: 612 [2022-11-25 15:33:51,183 INFO L226 Difference]: Without dead ends: 331 [2022-11-25 15:33:51,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:33:51,185 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 28 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:33:51,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 624 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:33:51,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-25 15:33:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 297. [2022-11-25 15:33:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 211 states have (on average 1.2464454976303319) internal successors, (263), 217 states have internal predecessors, (263), 62 states have call successors, (62), 19 states have call predecessors, (62), 23 states have return successors, (78), 60 states have call predecessors, (78), 60 states have call successors, (78) [2022-11-25 15:33:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 403 transitions. [2022-11-25 15:33:51,231 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 403 transitions. Word has length 74 [2022-11-25 15:33:51,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:33:51,231 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 403 transitions. [2022-11-25 15:33:51,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 15:33:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 403 transitions. [2022-11-25 15:33:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 15:33:51,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:33:51,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:33:51,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:33:51,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 15:33:51,442 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:33:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:33:51,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1341774803, now seen corresponding path program 1 times [2022-11-25 15:33:51,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:33:51,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61603399] [2022-11-25 15:33:51,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:51,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:33:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:53,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:33:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:53,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:33:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:53,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:33:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:53,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:33:53,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:53,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 15:33:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:53,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 15:33:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:53,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-25 15:33:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:33:53,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:33:53,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61603399] [2022-11-25 15:33:53,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61603399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:33:53,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025461639] [2022-11-25 15:33:53,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:33:53,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:33:53,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:33:53,983 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:33:54,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:33:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:33:54,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 2495 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 15:33:54,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:33:54,629 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 15:33:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:33:55,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:33:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:33:56,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025461639] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:33:56,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:33:56,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 9] total 29 [2022-11-25 15:33:56,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848720287] [2022-11-25 15:33:56,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:33:56,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 15:33:56,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:33:56,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 15:33:56,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-11-25 15:33:56,085 INFO L87 Difference]: Start difference. First operand 297 states and 403 transitions. Second operand has 29 states, 28 states have (on average 4.5) internal successors, (126), 27 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-11-25 15:34:00,301 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 15:34:04,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:34:06,803 WARN L539 Checker$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 15:34:08,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:34:10,964 WARN L539 Checker$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 15:34:12,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:34:16,057 WARN L539 Checker$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 15:34:18,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:34:20,267 WARN L539 Checker$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 15:34:22,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:34:24,827 WARN L539 Checker$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 15:34:27,041 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 15:34:27,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:34:27,165 INFO L93 Difference]: Finished difference Result 624 states and 867 transitions. [2022-11-25 15:34:27,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 15:34:27,166 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.5) internal successors, (126), 27 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 74 [2022-11-25 15:34:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:34:27,169 INFO L225 Difference]: With dead ends: 624 [2022-11-25 15:34:27,169 INFO L226 Difference]: Without dead ends: 348 [2022-11-25 15:34:27,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=425, Invalid=2025, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 15:34:27,172 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 571 mSDsluCounter, 2244 mSDsCounter, 0 mSdLazyCounter, 4936 mSolverCounterSat, 213 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 5161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 4936 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.7s IncrementalHoareTripleChecker+Time [2022-11-25 15:34:27,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 2407 Invalid, 5161 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [213 Valid, 4936 Invalid, 12 Unknown, 0 Unchecked, 29.7s Time] [2022-11-25 15:34:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-11-25 15:34:27,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 321. [2022-11-25 15:34:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 230 states have (on average 1.2173913043478262) internal successors, (280), 238 states have internal predecessors, (280), 64 states have call successors, (64), 21 states have call predecessors, (64), 26 states have return successors, (93), 61 states have call predecessors, (93), 61 states have call successors, (93) [2022-11-25 15:34:27,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 437 transitions. [2022-11-25 15:34:27,213 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 437 transitions. Word has length 74 [2022-11-25 15:34:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:34:27,213 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 437 transitions. [2022-11-25 15:34:27,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.5) internal successors, (126), 27 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-11-25 15:34:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 437 transitions. [2022-11-25 15:34:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 15:34:27,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:34:27,216 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:27,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:27,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 15:34:27,432 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:34:27,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:27,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1784602215, now seen corresponding path program 1 times [2022-11-25 15:34:27,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:27,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548533784] [2022-11-25 15:34:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:27,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:29,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:34:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:29,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:34:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:29,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:34:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:29,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:34:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:29,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 15:34:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:29,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 15:34:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:29,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-25 15:34:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 15:34:29,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:29,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548533784] [2022-11-25 15:34:29,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548533784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:29,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650279920] [2022-11-25 15:34:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:29,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:29,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:29,795 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:29,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:34:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:30,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 2492 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 15:34:30,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:31,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:32,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:34:32,297 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 41 treesize of output 1 [2022-11-25 15:34:32,560 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-11-25 15:34:32,561 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 41 treesize of output 37 [2022-11-25 15:34:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:34:32,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650279920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:32,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:32,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 30 [2022-11-25 15:34:32,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559303013] [2022-11-25 15:34:32,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:32,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 15:34:32,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:32,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 15:34:32,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-11-25 15:34:32,728 INFO L87 Difference]: Start difference. First operand 321 states and 437 transitions. Second operand has 30 states, 30 states have (on average 4.0) internal successors, (120), 28 states have internal predecessors, (120), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-25 15:34:42,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:34:42,939 INFO L93 Difference]: Finished difference Result 462 states and 608 transitions. [2022-11-25 15:34:42,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 15:34:42,939 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.0) internal successors, (120), 28 states have internal predecessors, (120), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) Word has length 74 [2022-11-25 15:34:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:34:42,942 INFO L225 Difference]: With dead ends: 462 [2022-11-25 15:34:42,943 INFO L226 Difference]: Without dead ends: 438 [2022-11-25 15:34:42,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=852, Invalid=3308, Unknown=0, NotChecked=0, Total=4160 [2022-11-25 15:34:42,945 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 494 mSDsluCounter, 1602 mSDsCounter, 0 mSdLazyCounter, 4459 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 4694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 4459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:34:42,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 1772 Invalid, 4694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 4459 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-25 15:34:42,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-25 15:34:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 390. [2022-11-25 15:34:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 289 states have (on average 1.2041522491349481) internal successors, (348), 298 states have internal predecessors, (348), 69 states have call successors, (69), 25 states have call predecessors, (69), 31 states have return successors, (97), 66 states have call predecessors, (97), 66 states have call successors, (97) [2022-11-25 15:34:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 514 transitions. [2022-11-25 15:34:42,996 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 514 transitions. Word has length 74 [2022-11-25 15:34:42,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:34:42,997 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 514 transitions. [2022-11-25 15:34:42,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.0) internal successors, (120), 28 states have internal predecessors, (120), 6 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (17), 6 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-25 15:34:42,997 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 514 transitions. [2022-11-25 15:34:42,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 15:34:42,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:34:42,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:34:43,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 15:34:43,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:43,203 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:34:43,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:34:43,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1612971803, now seen corresponding path program 1 times [2022-11-25 15:34:43,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:34:43,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039755639] [2022-11-25 15:34:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:43,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:34:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:45,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:34:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:45,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:34:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:45,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:34:45,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:45,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:34:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:46,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 15:34:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:46,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 15:34:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:46,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-25 15:34:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 15:34:46,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:34:46,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039755639] [2022-11-25 15:34:46,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039755639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:34:46,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937797885] [2022-11-25 15:34:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:34:46,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:34:46,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:34:46,857 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:34:46,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 15:34:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:34:47,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 2497 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 15:34:47,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:34:47,472 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 15:34:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:34:48,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:34:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:34:49,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937797885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:34:49,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:34:49,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 11] total 33 [2022-11-25 15:34:49,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211133942] [2022-11-25 15:34:49,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:34:49,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 15:34:49,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:34:49,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 15:34:49,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 15:34:49,806 INFO L87 Difference]: Start difference. First operand 390 states and 514 transitions. Second operand has 33 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-11-25 15:34:55,712 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 15:35:01,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:35:03,669 WARN L539 Checker$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 15:35:05,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:35:07,890 WARN L539 Checker$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 15:35:09,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:35:13,179 WARN L539 Checker$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 15:35:15,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:35:17,570 WARN L539 Checker$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 15:35:20,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:35:22,363 WARN L539 Checker$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 15:35:24,896 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 15:35:25,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:35:25,172 INFO L93 Difference]: Finished difference Result 444 states and 581 transitions. [2022-11-25 15:35:25,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 15:35:25,173 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 74 [2022-11-25 15:35:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:35:25,176 INFO L225 Difference]: With dead ends: 444 [2022-11-25 15:35:25,176 INFO L226 Difference]: Without dead ends: 430 [2022-11-25 15:35:25,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 139 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=657, Invalid=3003, Unknown=0, NotChecked=0, Total=3660 [2022-11-25 15:35:25,178 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 591 mSDsluCounter, 2028 mSDsCounter, 0 mSdLazyCounter, 4755 mSolverCounterSat, 277 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 2191 SdHoareTripleChecker+Invalid, 5044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 4755 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:35:25,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 2191 Invalid, 5044 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [277 Valid, 4755 Invalid, 12 Unknown, 0 Unchecked, 32.6s Time] [2022-11-25 15:35:25,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-11-25 15:35:25,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 392. [2022-11-25 15:35:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 292 states have (on average 1.202054794520548) internal successors, (351), 300 states have internal predecessors, (351), 69 states have call successors, (69), 25 states have call predecessors, (69), 30 states have return successors, (95), 66 states have call predecessors, (95), 66 states have call successors, (95) [2022-11-25 15:35:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 515 transitions. [2022-11-25 15:35:25,241 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 515 transitions. Word has length 74 [2022-11-25 15:35:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:35:25,241 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 515 transitions. [2022-11-25 15:35:25,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.9375) internal successors, (126), 31 states have internal predecessors, (126), 7 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-11-25 15:35:25,242 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 515 transitions. [2022-11-25 15:35:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-25 15:35:25,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:35:25,244 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:25,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 15:35:25,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:25,453 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:35:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:25,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1710014025, now seen corresponding path program 1 times [2022-11-25 15:35:25,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:25,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352358422] [2022-11-25 15:35:25,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:25,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:26,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:35:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:26,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:35:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:26,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:35:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:26,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:35:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:26,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 15:35:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:26,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-25 15:35:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:26,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-25 15:35:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:26,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:35:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:26,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-25 15:35:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 15:35:26,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:26,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352358422] [2022-11-25 15:35:26,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352358422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:26,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365083919] [2022-11-25 15:35:26,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:26,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:26,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:26,475 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:26,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 15:35:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:27,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 2581 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:35:27,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:35:27,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:35:27,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365083919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:27,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:35:27,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2022-11-25 15:35:27,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043944260] [2022-11-25 15:35:27,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:27,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:35:27,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:27,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:35:27,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:35:27,173 INFO L87 Difference]: Start difference. First operand 392 states and 515 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-25 15:35:27,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:35:27,541 INFO L93 Difference]: Finished difference Result 735 states and 967 transitions. [2022-11-25 15:35:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:35:27,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 78 [2022-11-25 15:35:27,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:35:27,545 INFO L225 Difference]: With dead ends: 735 [2022-11-25 15:35:27,546 INFO L226 Difference]: Without dead ends: 398 [2022-11-25 15:35:27,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:35:27,548 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 299 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:35:27,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 537 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 15:35:27,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-25 15:35:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2022-11-25 15:35:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 296 states have (on average 1.195945945945946) internal successors, (354), 306 states have internal predecessors, (354), 69 states have call successors, (69), 25 states have call predecessors, (69), 32 states have return successors, (102), 66 states have call predecessors, (102), 66 states have call successors, (102) [2022-11-25 15:35:27,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 525 transitions. [2022-11-25 15:35:27,610 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 525 transitions. Word has length 78 [2022-11-25 15:35:27,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:35:27,610 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 525 transitions. [2022-11-25 15:35:27,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-25 15:35:27,611 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 525 transitions. [2022-11-25 15:35:27,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-25 15:35:27,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:35:27,612 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:27,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:27,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:27,822 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:35:27,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:27,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1707972510, now seen corresponding path program 1 times [2022-11-25 15:35:27,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:27,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575806720] [2022-11-25 15:35:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:27,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:28,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:35:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:28,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:35:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:28,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:35:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:28,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:35:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:28,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 15:35:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:28,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 15:35:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:28,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-25 15:35:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:35:28,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:28,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575806720] [2022-11-25 15:35:28,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575806720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:28,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:28,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 15:35:28,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656439377] [2022-11-25 15:35:28,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:28,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:35:28,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:28,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:35:28,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:35:28,811 INFO L87 Difference]: Start difference. First operand 398 states and 525 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 15:35:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:35:29,946 INFO L93 Difference]: Finished difference Result 427 states and 558 transitions. [2022-11-25 15:35:29,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 15:35:29,946 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 76 [2022-11-25 15:35:29,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:35:29,949 INFO L225 Difference]: With dead ends: 427 [2022-11-25 15:35:29,949 INFO L226 Difference]: Without dead ends: 399 [2022-11-25 15:35:29,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:35:29,950 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 167 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 15:35:29,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1053 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 15:35:29,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-11-25 15:35:30,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 378. [2022-11-25 15:35:30,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 280 states have (on average 1.2) internal successors, (336), 289 states have internal predecessors, (336), 66 states have call successors, (66), 24 states have call predecessors, (66), 31 states have return successors, (92), 64 states have call predecessors, (92), 63 states have call successors, (92) [2022-11-25 15:35:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 494 transitions. [2022-11-25 15:35:30,008 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 494 transitions. Word has length 76 [2022-11-25 15:35:30,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:35:30,009 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 494 transitions. [2022-11-25 15:35:30,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 8 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-25 15:35:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 494 transitions. [2022-11-25 15:35:30,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-25 15:35:30,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:35:30,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:30,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 15:35:30,011 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:35:30,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:30,011 INFO L85 PathProgramCache]: Analyzing trace with hash -992443870, now seen corresponding path program 1 times [2022-11-25 15:35:30,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:30,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663050890] [2022-11-25 15:35:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:30,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:32,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:35:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:32,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:35:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:32,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:35:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:32,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:35:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:32,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 15:35:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:32,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 15:35:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:32,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-25 15:35:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:35:32,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:32,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663050890] [2022-11-25 15:35:32,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663050890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:32,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:32,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-25 15:35:32,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458497613] [2022-11-25 15:35:32,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:32,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 15:35:32,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:32,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 15:35:32,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:35:32,592 INFO L87 Difference]: Start difference. First operand 378 states and 494 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 15:35:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:35:34,738 INFO L93 Difference]: Finished difference Result 410 states and 535 transitions. [2022-11-25 15:35:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 15:35:34,739 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2022-11-25 15:35:34,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:35:34,741 INFO L225 Difference]: With dead ends: 410 [2022-11-25 15:35:34,741 INFO L226 Difference]: Without dead ends: 384 [2022-11-25 15:35:34,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-11-25 15:35:34,742 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 240 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 1902 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:35:34,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 1247 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1902 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 15:35:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-25 15:35:34,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 356. [2022-11-25 15:35:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 262 states have (on average 1.2061068702290076) internal successors, (316), 272 states have internal predecessors, (316), 63 states have call successors, (63), 22 states have call predecessors, (63), 30 states have return successors, (89), 61 states have call predecessors, (89), 60 states have call successors, (89) [2022-11-25 15:35:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 468 transitions. [2022-11-25 15:35:34,796 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 468 transitions. Word has length 76 [2022-11-25 15:35:34,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:35:34,796 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 468 transitions. [2022-11-25 15:35:34,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 12 states have internal predecessors, (58), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 15:35:34,796 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 468 transitions. [2022-11-25 15:35:34,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-25 15:35:34,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:35:34,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:34,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 15:35:34,799 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:35:34,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:34,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1537117189, now seen corresponding path program 1 times [2022-11-25 15:35:34,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:34,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632225351] [2022-11-25 15:35:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:34,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:35,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:35:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:35,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:35:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:35,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:35:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:35,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:35:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:35,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 15:35:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:35,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-25 15:35:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:35,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-25 15:35:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:35,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:35:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:35,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-25 15:35:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:35:35,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:35,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632225351] [2022-11-25 15:35:35,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632225351] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:35,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:35,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 15:35:35,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042135872] [2022-11-25 15:35:35,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:35,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:35:35,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:35,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:35:35,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:35:35,269 INFO L87 Difference]: Start difference. First operand 356 states and 468 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-25 15:35:36,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:35:36,193 INFO L93 Difference]: Finished difference Result 489 states and 622 transitions. [2022-11-25 15:35:36,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:35:36,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 89 [2022-11-25 15:35:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:35:36,196 INFO L225 Difference]: With dead ends: 489 [2022-11-25 15:35:36,196 INFO L226 Difference]: Without dead ends: 381 [2022-11-25 15:35:36,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:35:36,197 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 84 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 15:35:36,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 712 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 15:35:36,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-25 15:35:36,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 358. [2022-11-25 15:35:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 264 states have (on average 1.2045454545454546) internal successors, (318), 274 states have internal predecessors, (318), 63 states have call successors, (63), 22 states have call predecessors, (63), 30 states have return successors, (89), 61 states have call predecessors, (89), 60 states have call successors, (89) [2022-11-25 15:35:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 470 transitions. [2022-11-25 15:35:36,254 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 470 transitions. Word has length 89 [2022-11-25 15:35:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:35:36,254 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 470 transitions. [2022-11-25 15:35:36,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 6 states have internal predecessors, (60), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2022-11-25 15:35:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 470 transitions. [2022-11-25 15:35:36,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-25 15:35:36,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:35:36,257 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:36,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 15:35:36,257 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:35:36,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:36,257 INFO L85 PathProgramCache]: Analyzing trace with hash 917754153, now seen corresponding path program 1 times [2022-11-25 15:35:36,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:36,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603779224] [2022-11-25 15:35:36,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:36,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:36,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:35:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:36,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:35:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:36,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:35:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:36,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:35:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:36,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 15:35:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:36,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-25 15:35:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:36,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-25 15:35:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:36,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:35:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:36,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-25 15:35:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-25 15:35:36,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:36,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603779224] [2022-11-25 15:35:36,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603779224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:36,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:36,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 15:35:36,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404031451] [2022-11-25 15:35:36,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:36,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:35:36,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:36,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:35:36,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:35:36,660 INFO L87 Difference]: Start difference. First operand 358 states and 470 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-25 15:35:37,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:35:37,270 INFO L93 Difference]: Finished difference Result 418 states and 534 transitions. [2022-11-25 15:35:37,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 15:35:37,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 90 [2022-11-25 15:35:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:35:37,272 INFO L225 Difference]: With dead ends: 418 [2022-11-25 15:35:37,273 INFO L226 Difference]: Without dead ends: 364 [2022-11-25 15:35:37,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-25 15:35:37,274 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 59 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 15:35:37,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 519 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 15:35:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-11-25 15:35:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 352. [2022-11-25 15:35:37,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 261 states have (on average 1.2030651340996168) internal successors, (314), 270 states have internal predecessors, (314), 61 states have call successors, (61), 22 states have call predecessors, (61), 29 states have return successors, (81), 59 states have call predecessors, (81), 58 states have call successors, (81) [2022-11-25 15:35:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 456 transitions. [2022-11-25 15:35:37,326 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 456 transitions. Word has length 90 [2022-11-25 15:35:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:35:37,326 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 456 transitions. [2022-11-25 15:35:37,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-25 15:35:37,327 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 456 transitions. [2022-11-25 15:35:37,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-25 15:35:37,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:35:37,329 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:37,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 15:35:37,329 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:35:37,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:37,330 INFO L85 PathProgramCache]: Analyzing trace with hash -381488286, now seen corresponding path program 1 times [2022-11-25 15:35:37,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:37,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037771728] [2022-11-25 15:35:37,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:37,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:37,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:35:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:37,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:35:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:37,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:35:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:37,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:35:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:37,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 15:35:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:37,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-25 15:35:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:37,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-25 15:35:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:37,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:35:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:37,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 15:35:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:38,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-25 15:35:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-25 15:35:38,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:38,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037771728] [2022-11-25 15:35:38,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037771728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:38,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:35:38,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 15:35:38,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302018357] [2022-11-25 15:35:38,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:38,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 15:35:38,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:38,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 15:35:38,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:35:38,090 INFO L87 Difference]: Start difference. First operand 352 states and 456 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 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 15:35:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:35:39,074 INFO L93 Difference]: Finished difference Result 381 states and 492 transitions. [2022-11-25 15:35:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 15:35:39,075 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 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 96 [2022-11-25 15:35:39,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:35:39,077 INFO L225 Difference]: With dead ends: 381 [2022-11-25 15:35:39,078 INFO L226 Difference]: Without dead ends: 379 [2022-11-25 15:35:39,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-25 15:35:39,079 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 101 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 15:35:39,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 838 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 15:35:39,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-25 15:35:39,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 361. [2022-11-25 15:35:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 267 states have (on average 1.198501872659176) internal successors, (320), 277 states have internal predecessors, (320), 62 states have call successors, (62), 23 states have call predecessors, (62), 31 states have return successors, (87), 60 states have call predecessors, (87), 59 states have call successors, (87) [2022-11-25 15:35:39,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 469 transitions. [2022-11-25 15:35:39,135 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 469 transitions. Word has length 96 [2022-11-25 15:35:39,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:35:39,135 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 469 transitions. [2022-11-25 15:35:39,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (11), 5 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 15:35:39,136 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 469 transitions. [2022-11-25 15:35:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-25 15:35:39,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:35:39,138 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:39,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 15:35:39,138 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:35:39,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2050117184, now seen corresponding path program 1 times [2022-11-25 15:35:39,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:39,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877351826] [2022-11-25 15:35:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:39,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:39,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:35:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:39,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:35:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:39,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:35:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:39,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:35:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:40,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 15:35:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:40,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-25 15:35:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:40,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-25 15:35:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:40,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:35:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:40,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-25 15:35:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:40,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-25 15:35:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 15:35:40,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:40,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877351826] [2022-11-25 15:35:40,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877351826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:40,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103417827] [2022-11-25 15:35:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:40,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:40,223 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:40,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 15:35:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:40,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 2641 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:35:40,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 15:35:41,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:35:41,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103417827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:35:41,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:35:41,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2022-11-25 15:35:41,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168292525] [2022-11-25 15:35:41,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:35:41,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 15:35:41,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:41,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 15:35:41,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-11-25 15:35:41,026 INFO L87 Difference]: Start difference. First operand 361 states and 469 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-25 15:35:41,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:35:41,423 INFO L93 Difference]: Finished difference Result 620 states and 806 transitions. [2022-11-25 15:35:41,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:35:41,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 97 [2022-11-25 15:35:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:35:41,427 INFO L225 Difference]: With dead ends: 620 [2022-11-25 15:35:41,427 INFO L226 Difference]: Without dead ends: 362 [2022-11-25 15:35:41,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-11-25 15:35:41,429 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 321 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:35:41,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 629 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:35:41,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-25 15:35:41,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 358. [2022-11-25 15:35:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 265 states have (on average 1.1924528301886792) internal successors, (316), 274 states have internal predecessors, (316), 62 states have call successors, (62), 23 states have call predecessors, (62), 30 states have return successors, (84), 60 states have call predecessors, (84), 59 states have call successors, (84) [2022-11-25 15:35:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 462 transitions. [2022-11-25 15:35:41,484 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 462 transitions. Word has length 97 [2022-11-25 15:35:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:35:41,484 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 462 transitions. [2022-11-25 15:35:41,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-25 15:35:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 462 transitions. [2022-11-25 15:35:41,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-25 15:35:41,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:35:41,487 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:35:41,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:35:41,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:41,697 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:35:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:35:41,697 INFO L85 PathProgramCache]: Analyzing trace with hash -37945624, now seen corresponding path program 1 times [2022-11-25 15:35:41,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:35:41,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696470328] [2022-11-25 15:35:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:41,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:35:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:43,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:35:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:43,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:35:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:43,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:35:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:43,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:35:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:43,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 15:35:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:43,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-25 15:35:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:43,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-25 15:35:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:43,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:35:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:43,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 15:35:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:43,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-11-25 15:35:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 15:35:43,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:35:43,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696470328] [2022-11-25 15:35:43,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696470328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:43,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934369002] [2022-11-25 15:35:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:35:43,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:35:43,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:35:43,518 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:35:43,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 15:35:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:35:44,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 2626 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 15:35:44,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:35:44,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 15:35:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:35:45,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:35:45,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934369002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:35:45,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:35:45,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2022-11-25 15:35:45,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465719225] [2022-11-25 15:35:45,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:35:45,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 15:35:45,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:35:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 15:35:45,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-11-25 15:35:45,802 INFO L87 Difference]: Start difference. First operand 358 states and 462 transitions. Second operand has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) [2022-11-25 15:35:50,338 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 15:35:55,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:35:57,218 WARN L539 Checker$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 15:35:59,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:36:01,471 WARN L539 Checker$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 15:36:03,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:36:06,085 WARN L539 Checker$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 15:36:08,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:36:10,926 WARN L539 Checker$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 15:36:13,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:36:15,162 WARN L539 Checker$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 15:36:17,593 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 15:36:17,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:17,727 INFO L93 Difference]: Finished difference Result 713 states and 921 transitions. [2022-11-25 15:36:17,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 15:36:17,728 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2022-11-25 15:36:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:17,730 INFO L225 Difference]: With dead ends: 713 [2022-11-25 15:36:17,730 INFO L226 Difference]: Without dead ends: 390 [2022-11-25 15:36:17,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=787, Invalid=3988, Unknown=55, NotChecked=0, Total=4830 [2022-11-25 15:36:17,732 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 863 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 3977 mSolverCounterSat, 343 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 2098 SdHoareTripleChecker+Invalid, 4339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 3977 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:17,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 2098 Invalid, 4339 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [343 Valid, 3977 Invalid, 19 Unknown, 0 Unchecked, 29.3s Time] [2022-11-25 15:36:17,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-25 15:36:17,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 358. [2022-11-25 15:36:17,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 264 states have (on average 1.178030303030303) internal successors, (311), 273 states have internal predecessors, (311), 62 states have call successors, (62), 24 states have call predecessors, (62), 31 states have return successors, (86), 60 states have call predecessors, (86), 59 states have call successors, (86) [2022-11-25 15:36:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 459 transitions. [2022-11-25 15:36:17,791 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 459 transitions. Word has length 100 [2022-11-25 15:36:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:17,791 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 459 transitions. [2022-11-25 15:36:17,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.24) internal successors, (131), 21 states have internal predecessors, (131), 10 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 8 states have call predecessors, (18), 10 states have call successors, (18) [2022-11-25 15:36:17,792 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 459 transitions. [2022-11-25 15:36:17,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-25 15:36:17,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:17,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:17,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-25 15:36:18,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 15:36:18,004 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:18,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:18,004 INFO L85 PathProgramCache]: Analyzing trace with hash 80106082, now seen corresponding path program 1 times [2022-11-25 15:36:18,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:18,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046151020] [2022-11-25 15:36:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:18,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:18,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:36:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:18,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:36:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:18,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:36:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:18,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:36:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:18,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 15:36:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:18,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-25 15:36:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:18,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-25 15:36:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:18,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:36:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:18,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 15:36:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:18,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-25 15:36:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-25 15:36:18,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:18,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046151020] [2022-11-25 15:36:18,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046151020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:18,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219425683] [2022-11-25 15:36:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:18,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:18,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:18,871 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:18,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 15:36:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:19,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 2627 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 15:36:19,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:19,529 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 15:36:19,535 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 15:36:19,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 15:36:19,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-25 15:36:20,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 15:36:20,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 15:36:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-25 15:36:20,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:36:20,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219425683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:36:20,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:36:20,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2022-11-25 15:36:20,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285798056] [2022-11-25 15:36:20,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:36:20,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:36:20,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:20,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:36:20,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:36:20,125 INFO L87 Difference]: Start difference. First operand 358 states and 459 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-25 15:36:20,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:20,859 INFO L93 Difference]: Finished difference Result 742 states and 939 transitions. [2022-11-25 15:36:20,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:36:20,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 104 [2022-11-25 15:36:20,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:20,862 INFO L225 Difference]: With dead ends: 742 [2022-11-25 15:36:20,862 INFO L226 Difference]: Without dead ends: 358 [2022-11-25 15:36:20,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-25 15:36:20,865 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 60 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:20,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 1277 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 15:36:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-25 15:36:20,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2022-11-25 15:36:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 264 states have (on average 1.1742424242424243) internal successors, (310), 273 states have internal predecessors, (310), 62 states have call successors, (62), 24 states have call predecessors, (62), 31 states have return successors, (86), 60 states have call predecessors, (86), 59 states have call successors, (86) [2022-11-25 15:36:20,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 458 transitions. [2022-11-25 15:36:20,938 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 458 transitions. Word has length 104 [2022-11-25 15:36:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:20,938 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 458 transitions. [2022-11-25 15:36:20,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 5 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-25 15:36:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 458 transitions. [2022-11-25 15:36:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-25 15:36:20,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:20,941 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:20,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:21,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 15:36:21,151 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:21,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:21,152 INFO L85 PathProgramCache]: Analyzing trace with hash -452334558, now seen corresponding path program 1 times [2022-11-25 15:36:21,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:21,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282236069] [2022-11-25 15:36:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:21,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:21,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:36:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:21,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:36:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:21,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:36:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:21,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:36:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:21,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:36:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:21,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:36:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:21,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:36:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:22,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-25 15:36:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:22,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:36:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:22,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 15:36:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:22,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-11-25 15:36:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-25 15:36:22,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:22,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282236069] [2022-11-25 15:36:22,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282236069] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:22,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473716913] [2022-11-25 15:36:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:22,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:22,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:22,080 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:22,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 15:36:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:22,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 2640 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 15:36:22,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:22,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:36:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:36:24,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:26,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473716913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:26,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:36:26,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17] total 25 [2022-11-25 15:36:26,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180505952] [2022-11-25 15:36:26,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:26,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 15:36:26,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:26,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 15:36:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 15:36:26,932 INFO L87 Difference]: Start difference. First operand 358 states and 458 transitions. Second operand has 25 states, 25 states have (on average 5.24) internal successors, (131), 20 states have internal predecessors, (131), 7 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-11-25 15:36:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:36:40,402 INFO L93 Difference]: Finished difference Result 770 states and 1028 transitions. [2022-11-25 15:36:40,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-25 15:36:40,403 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.24) internal successors, (131), 20 states have internal predecessors, (131), 7 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 109 [2022-11-25 15:36:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:36:40,406 INFO L225 Difference]: With dead ends: 770 [2022-11-25 15:36:40,407 INFO L226 Difference]: Without dead ends: 452 [2022-11-25 15:36:40,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 143 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1101, Invalid=5379, Unknown=0, NotChecked=0, Total=6480 [2022-11-25 15:36:40,411 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 712 mSDsluCounter, 1982 mSDsCounter, 0 mSdLazyCounter, 5362 mSolverCounterSat, 381 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 2143 SdHoareTripleChecker+Invalid, 5750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 5362 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-25 15:36:40,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 2143 Invalid, 5750 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [381 Valid, 5362 Invalid, 7 Unknown, 0 Unchecked, 8.9s Time] [2022-11-25 15:36:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-11-25 15:36:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 411. [2022-11-25 15:36:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 301 states have (on average 1.1727574750830565) internal successors, (353), 310 states have internal predecessors, (353), 79 states have call successors, (79), 25 states have call predecessors, (79), 30 states have return successors, (109), 75 states have call predecessors, (109), 73 states have call successors, (109) [2022-11-25 15:36:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 541 transitions. [2022-11-25 15:36:40,509 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 541 transitions. Word has length 109 [2022-11-25 15:36:40,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:36:40,510 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 541 transitions. [2022-11-25 15:36:40,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.24) internal successors, (131), 20 states have internal predecessors, (131), 7 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-11-25 15:36:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 541 transitions. [2022-11-25 15:36:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-25 15:36:40,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:36:40,512 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:36:40,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 15:36:40,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:40,724 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:36:40,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:36:40,724 INFO L85 PathProgramCache]: Analyzing trace with hash -599307329, now seen corresponding path program 1 times [2022-11-25 15:36:40,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:36:40,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507414260] [2022-11-25 15:36:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:40,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:36:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:42,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:36:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:42,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:36:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:42,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:36:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:42,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:36:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:42,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:36:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:42,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:36:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:42,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:36:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:42,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:36:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:43,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:36:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:43,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 15:36:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:43,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-25 15:36:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 15:36:43,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:36:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507414260] [2022-11-25 15:36:43,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507414260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:36:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049142844] [2022-11-25 15:36:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:36:43,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:36:43,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:36:43,051 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:36:43,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 15:36:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:36:43,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 2650 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-25 15:36:43,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:36:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:36:44,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:36:45,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-25 15:36:45,188 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-25 15:36:45,188 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 31 treesize of output 25 [2022-11-25 15:36:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 15:36:45,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049142844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:36:45,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:36:45,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 23 [2022-11-25 15:36:45,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593768256] [2022-11-25 15:36:45,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:36:45,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 15:36:45,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:36:45,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 15:36:45,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-11-25 15:36:45,240 INFO L87 Difference]: Start difference. First operand 411 states and 541 transitions. Second operand has 23 states, 23 states have (on average 6.478260869565218) internal successors, (149), 18 states have internal predecessors, (149), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) [2022-11-25 15:36:47,623 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 15:36:49,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:36:51,893 WARN L539 Checker$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 15:36:54,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:36:57,431 WARN L539 Checker$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 15:36:59,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:37:01,719 WARN L539 Checker$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 15:37:03,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:37:08,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:37:10,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:37:12,273 WARN L539 Checker$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 15:37:14,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:37:16,373 WARN L539 Checker$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 15:37:18,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:37:21,028 WARN L539 Checker$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 15:37:23,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:37:25,676 WARN L539 Checker$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 15:37:27,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:37:29,995 WARN L539 Checker$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 15:37:30,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:37:30,627 INFO L93 Difference]: Finished difference Result 881 states and 1122 transitions. [2022-11-25 15:37:30,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 15:37:30,628 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.478260869565218) internal successors, (149), 18 states have internal predecessors, (149), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) Word has length 111 [2022-11-25 15:37:30,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:37:30,631 INFO L225 Difference]: With dead ends: 881 [2022-11-25 15:37:30,631 INFO L226 Difference]: Without dead ends: 577 [2022-11-25 15:37:30,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 236 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=320, Invalid=1396, Unknown=6, NotChecked=0, Total=1722 [2022-11-25 15:37:30,634 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 439 mSDsluCounter, 1313 mSDsCounter, 0 mSdLazyCounter, 3144 mSolverCounterSat, 195 mSolverCounterUnsat, 77 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 3416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 3144 IncrementalHoareTripleChecker+Invalid, 77 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.9s IncrementalHoareTripleChecker+Time [2022-11-25 15:37:30,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 1493 Invalid, 3416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 3144 Invalid, 77 Unknown, 0 Unchecked, 43.9s Time] [2022-11-25 15:37:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-11-25 15:37:30,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 514. [2022-11-25 15:37:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 384 states have (on average 1.171875) internal successors, (450), 395 states have internal predecessors, (450), 86 states have call successors, (86), 37 states have call predecessors, (86), 43 states have return successors, (109), 81 states have call predecessors, (109), 80 states have call successors, (109) [2022-11-25 15:37:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 645 transitions. [2022-11-25 15:37:30,762 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 645 transitions. Word has length 111 [2022-11-25 15:37:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:37:30,763 INFO L495 AbstractCegarLoop]: Abstraction has 514 states and 645 transitions. [2022-11-25 15:37:30,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.478260869565218) internal successors, (149), 18 states have internal predecessors, (149), 7 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (21), 5 states have call predecessors, (21), 7 states have call successors, (21) [2022-11-25 15:37:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 645 transitions. [2022-11-25 15:37:30,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-25 15:37:30,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:37:30,765 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:37:30,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 15:37:30,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:37:30,977 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:37:30,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:37:30,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1339854717, now seen corresponding path program 1 times [2022-11-25 15:37:30,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:37:30,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521835556] [2022-11-25 15:37:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:37:30,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:37:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:34,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:37:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:34,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:37:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:34,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:37:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:34,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:37:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:34,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:37:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:34,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:37:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:34,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:37:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:35,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:37:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:35,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:37:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:35,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 15:37:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:35,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-25 15:37:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 15:37:36,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:37:36,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521835556] [2022-11-25 15:37:36,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521835556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:37:36,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508772747] [2022-11-25 15:37:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:37:36,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:37:36,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:37:36,155 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:37:36,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 15:37:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:37:36,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 2655 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-25 15:37:36,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:37:36,879 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 15:37:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 34 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 15:37:38,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:37:39,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508772747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:37:39,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:37:39,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2022-11-25 15:37:39,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167043313] [2022-11-25 15:37:39,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:37:39,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 15:37:39,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:37:39,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 15:37:39,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 15:37:39,463 INFO L87 Difference]: Start difference. First operand 514 states and 645 transitions. Second operand has 28 states, 27 states have (on average 4.37037037037037) internal successors, (118), 24 states have internal predecessors, (118), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-25 15:37:44,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:37:51,021 WARN L539 Checker$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 15:37:53,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:37:55,205 WARN L539 Checker$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 15:37:57,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:37:59,326 WARN L539 Checker$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 15:38:01,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:38:04,024 WARN L539 Checker$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 15:38:06,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:38:08,646 WARN L539 Checker$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 15:38:10,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:38:12,955 WARN L539 Checker$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 15:38:13,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:38:13,453 INFO L93 Difference]: Finished difference Result 632 states and 779 transitions. [2022-11-25 15:38:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 15:38:13,454 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 4.37037037037037) internal successors, (118), 24 states have internal predecessors, (118), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 111 [2022-11-25 15:38:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:38:13,457 INFO L225 Difference]: With dead ends: 632 [2022-11-25 15:38:13,458 INFO L226 Difference]: Without dead ends: 593 [2022-11-25 15:38:13,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 152 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=737, Invalid=3525, Unknown=28, NotChecked=0, Total=4290 [2022-11-25 15:38:13,460 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 695 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 3025 mSolverCounterSat, 331 mSolverCounterUnsat, 42 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 3398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 3025 IncrementalHoareTripleChecker+Invalid, 42 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2022-11-25 15:38:13,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 1394 Invalid, 3398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 3025 Invalid, 42 Unknown, 0 Unchecked, 29.9s Time] [2022-11-25 15:38:13,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-25 15:38:13,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 529. [2022-11-25 15:38:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 398 states have (on average 1.1683417085427135) internal successors, (465), 409 states have internal predecessors, (465), 86 states have call successors, (86), 38 states have call predecessors, (86), 44 states have return successors, (110), 81 states have call predecessors, (110), 80 states have call successors, (110) [2022-11-25 15:38:13,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 661 transitions. [2022-11-25 15:38:13,586 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 661 transitions. Word has length 111 [2022-11-25 15:38:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:38:13,587 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 661 transitions. [2022-11-25 15:38:13,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 4.37037037037037) internal successors, (118), 24 states have internal predecessors, (118), 8 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-25 15:38:13,587 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 661 transitions. [2022-11-25 15:38:13,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-25 15:38:13,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:38:13,589 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:13,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 15:38:13,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 15:38:13,800 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:38:13,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:13,801 INFO L85 PathProgramCache]: Analyzing trace with hash 535434050, now seen corresponding path program 1 times [2022-11-25 15:38:13,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:13,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187307840] [2022-11-25 15:38:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:13,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:38:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:38:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:38:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:38:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:38:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:38:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:38:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:38:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:38:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 15:38:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-25 15:38:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-25 15:38:14,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:14,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187307840] [2022-11-25 15:38:14,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187307840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:14,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:14,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 15:38:14,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546518414] [2022-11-25 15:38:14,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:14,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 15:38:14,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:14,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 15:38:14,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-11-25 15:38:14,907 INFO L87 Difference]: Start difference. First operand 529 states and 661 transitions. Second operand has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-25 15:38:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:38:16,160 INFO L93 Difference]: Finished difference Result 572 states and 708 transitions. [2022-11-25 15:38:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 15:38:16,160 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 113 [2022-11-25 15:38:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:38:16,163 INFO L225 Difference]: With dead ends: 572 [2022-11-25 15:38:16,164 INFO L226 Difference]: Without dead ends: 564 [2022-11-25 15:38:16,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:38:16,165 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 236 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 15:38:16,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 973 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 15:38:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-11-25 15:38:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 527. [2022-11-25 15:38:16,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 398 states have (on average 1.1658291457286432) internal successors, (464), 408 states have internal predecessors, (464), 84 states have call successors, (84), 38 states have call predecessors, (84), 44 states have return successors, (109), 80 states have call predecessors, (109), 79 states have call successors, (109) [2022-11-25 15:38:16,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 657 transitions. [2022-11-25 15:38:16,285 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 657 transitions. Word has length 113 [2022-11-25 15:38:16,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:38:16,285 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 657 transitions. [2022-11-25 15:38:16,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.083333333333333) internal successors, (61), 8 states have internal predecessors, (61), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-25 15:38:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 657 transitions. [2022-11-25 15:38:16,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-25 15:38:16,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:38:16,288 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:16,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-25 15:38:16,288 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:38:16,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:16,289 INFO L85 PathProgramCache]: Analyzing trace with hash 782483972, now seen corresponding path program 1 times [2022-11-25 15:38:16,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:16,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899181227] [2022-11-25 15:38:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:16,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:18,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:38:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:18,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:38:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:18,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:38:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:18,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:38:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:18,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:38:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:18,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:38:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:18,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:38:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:18,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:38:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:18,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:38:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:18,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 15:38:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:18,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-25 15:38:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 15:38:19,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:19,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899181227] [2022-11-25 15:38:19,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899181227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:19,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:19,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-11-25 15:38:19,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029095231] [2022-11-25 15:38:19,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:19,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 15:38:19,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:19,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 15:38:19,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:38:19,321 INFO L87 Difference]: Start difference. First operand 527 states and 657 transitions. Second operand has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-25 15:38:22,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:38:22,583 INFO L93 Difference]: Finished difference Result 573 states and 710 transitions. [2022-11-25 15:38:22,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 15:38:22,584 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 113 [2022-11-25 15:38:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:38:22,588 INFO L225 Difference]: With dead ends: 573 [2022-11-25 15:38:22,588 INFO L226 Difference]: Without dead ends: 571 [2022-11-25 15:38:22,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 15:38:22,590 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 468 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 2580 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 2827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 2580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-25 15:38:22,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 1668 Invalid, 2827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 2580 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-25 15:38:22,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-11-25 15:38:22,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 526. [2022-11-25 15:38:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 398 states have (on average 1.1658291457286432) internal successors, (464), 408 states have internal predecessors, (464), 83 states have call successors, (83), 38 states have call predecessors, (83), 44 states have return successors, (108), 79 states have call predecessors, (108), 78 states have call successors, (108) [2022-11-25 15:38:22,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 655 transitions. [2022-11-25 15:38:22,747 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 655 transitions. Word has length 113 [2022-11-25 15:38:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:38:22,747 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 655 transitions. [2022-11-25 15:38:22,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 14 states have internal predecessors, (71), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-25 15:38:22,748 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 655 transitions. [2022-11-25 15:38:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-25 15:38:22,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:38:22,749 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:22,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-25 15:38:22,750 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:38:22,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash 47539994, now seen corresponding path program 1 times [2022-11-25 15:38:22,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:22,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258389184] [2022-11-25 15:38:22,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:22,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:23,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:38:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:23,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:38:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:23,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:38:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:23,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:38:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:23,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:38:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:23,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:38:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:23,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:38:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:23,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:38:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:23,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:38:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:23,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 15:38:23,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:23,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-25 15:38:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-25 15:38:23,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:23,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258389184] [2022-11-25 15:38:23,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258389184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:23,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:23,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 15:38:23,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473468434] [2022-11-25 15:38:23,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:23,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:38:23,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:38:23,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:38:23,211 INFO L87 Difference]: Start difference. First operand 526 states and 655 transitions. Second operand has 10 states, 10 states have (on average 6.5) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-25 15:38:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:38:24,288 INFO L93 Difference]: Finished difference Result 688 states and 835 transitions. [2022-11-25 15:38:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:38:24,288 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 114 [2022-11-25 15:38:24,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:38:24,291 INFO L225 Difference]: With dead ends: 688 [2022-11-25 15:38:24,291 INFO L226 Difference]: Without dead ends: 566 [2022-11-25 15:38:24,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:38:24,293 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 80 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 15:38:24,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 740 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 15:38:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-11-25 15:38:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 524. [2022-11-25 15:38:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 397 states have (on average 1.163727959697733) internal successors, (462), 407 states have internal predecessors, (462), 82 states have call successors, (82), 38 states have call predecessors, (82), 44 states have return successors, (107), 78 states have call predecessors, (107), 77 states have call successors, (107) [2022-11-25 15:38:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 651 transitions. [2022-11-25 15:38:24,437 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 651 transitions. Word has length 114 [2022-11-25 15:38:24,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:38:24,437 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 651 transitions. [2022-11-25 15:38:24,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.5) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-25 15:38:24,438 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 651 transitions. [2022-11-25 15:38:24,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-25 15:38:24,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:38:24,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:24,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-25 15:38:24,440 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:38:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:24,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1150461638, now seen corresponding path program 1 times [2022-11-25 15:38:24,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:24,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129531374] [2022-11-25 15:38:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:24,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:27,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:38:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:27,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:38:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:27,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:38:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:27,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:38:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:27,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:38:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:27,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:38:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:27,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:38:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:27,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:38:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:27,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:38:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:27,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-25 15:38:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:27,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-25 15:38:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-25 15:38:27,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:27,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129531374] [2022-11-25 15:38:27,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129531374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:27,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:27,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-11-25 15:38:27,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254072477] [2022-11-25 15:38:27,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:27,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 15:38:27,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:27,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 15:38:27,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:38:27,648 INFO L87 Difference]: Start difference. First operand 524 states and 651 transitions. Second operand has 17 states, 16 states have (on average 4.0) internal successors, (64), 14 states have internal predecessors, (64), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-25 15:38:30,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:38:30,394 INFO L93 Difference]: Finished difference Result 697 states and 861 transitions. [2022-11-25 15:38:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 15:38:30,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 14 states have internal predecessors, (64), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 116 [2022-11-25 15:38:30,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:38:30,398 INFO L225 Difference]: With dead ends: 697 [2022-11-25 15:38:30,399 INFO L226 Difference]: Without dead ends: 595 [2022-11-25 15:38:30,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2022-11-25 15:38:30,400 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 461 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:38:30,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 501 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-25 15:38:30,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-11-25 15:38:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 520. [2022-11-25 15:38:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 395 states have (on average 1.159493670886076) internal successors, (458), 405 states have internal predecessors, (458), 80 states have call successors, (80), 38 states have call predecessors, (80), 44 states have return successors, (105), 76 states have call predecessors, (105), 75 states have call successors, (105) [2022-11-25 15:38:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 643 transitions. [2022-11-25 15:38:30,523 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 643 transitions. Word has length 116 [2022-11-25 15:38:30,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:38:30,524 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 643 transitions. [2022-11-25 15:38:30,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 14 states have internal predecessors, (64), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-25 15:38:30,524 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 643 transitions. [2022-11-25 15:38:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-25 15:38:30,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:38:30,527 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:30,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-25 15:38:30,528 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:38:30,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:30,528 INFO L85 PathProgramCache]: Analyzing trace with hash -210225369, now seen corresponding path program 1 times [2022-11-25 15:38:30,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:30,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435008642] [2022-11-25 15:38:30,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:30,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:38:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:38:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:38:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:38:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:38:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:38:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:38:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:38:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:38:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 15:38:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-25 15:38:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-25 15:38:31,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:31,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435008642] [2022-11-25 15:38:31,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435008642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:38:31,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:38:31,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-25 15:38:31,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456745667] [2022-11-25 15:38:31,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:38:31,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 15:38:31,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:31,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 15:38:31,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-25 15:38:31,309 INFO L87 Difference]: Start difference. First operand 520 states and 643 transitions. Second operand has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-25 15:38:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:38:32,396 INFO L93 Difference]: Finished difference Result 573 states and 705 transitions. [2022-11-25 15:38:32,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 15:38:32,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 120 [2022-11-25 15:38:32,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:38:32,401 INFO L225 Difference]: With dead ends: 573 [2022-11-25 15:38:32,401 INFO L226 Difference]: Without dead ends: 571 [2022-11-25 15:38:32,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:38:32,403 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 132 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 15:38:32,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 761 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 15:38:32,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-11-25 15:38:32,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 547. [2022-11-25 15:38:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 413 states have (on average 1.152542372881356) internal successors, (476), 426 states have internal predecessors, (476), 83 states have call successors, (83), 41 states have call predecessors, (83), 50 states have return successors, (118), 79 states have call predecessors, (118), 78 states have call successors, (118) [2022-11-25 15:38:32,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 677 transitions. [2022-11-25 15:38:32,551 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 677 transitions. Word has length 120 [2022-11-25 15:38:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:38:32,551 INFO L495 AbstractCegarLoop]: Abstraction has 547 states and 677 transitions. [2022-11-25 15:38:32,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.222222222222222) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-25 15:38:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 677 transitions. [2022-11-25 15:38:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-25 15:38:32,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:38:32,555 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:38:32,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-25 15:38:32,555 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:38:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:38:32,556 INFO L85 PathProgramCache]: Analyzing trace with hash -947242963, now seen corresponding path program 1 times [2022-11-25 15:38:32,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:38:32,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095215054] [2022-11-25 15:38:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:32,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:38:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:35,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:38:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:35,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:38:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:35,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:38:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:35,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:38:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:35,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:38:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:35,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:38:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:35,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:38:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:35,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:38:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:35,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:38:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:35,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 15:38:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:36,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-11-25 15:38:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-25 15:38:36,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:38:36,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095215054] [2022-11-25 15:38:36,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095215054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:36,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315203938] [2022-11-25 15:38:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:38:36,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:38:36,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:38:36,068 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:38:36,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 15:38:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:38:36,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-25 15:38:36,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:38:37,094 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 15:38:37,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 15:38:44,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-25 15:38:44,398 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1436 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_1436))) (exists ((v_ArrVal_1435 Int)) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base|) |c_aws_add_size_checked_#in~r#1.offset| v_ArrVal_1435)) |c_#memory_$Pointer$.base|))) is different from true [2022-11-25 15:38:44,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:38:44,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-25 15:38:44,449 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 15:38:44,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2022-11-25 15:38:44,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-11-25 15:38:46,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:38:46,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:38:46,912 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-25 15:38:46,912 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 26 treesize of output 1 [2022-11-25 15:38:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 71 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:38:46,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:38:49,817 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| Int)) (or (forall ((v_ArrVal_1444 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_1444) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 16)) 18446744073709551616) 0))) (forall ((v_ArrVal_1443 Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.offset| v_ArrVal_1443)) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 8)) 0))))) is different from false [2022-11-25 15:38:49,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315203938] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:38:49,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:38:49,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 36 [2022-11-25 15:38:49,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65244785] [2022-11-25 15:38:49,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:38:49,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 15:38:49,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:38:49,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 15:38:49,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1822, Unknown=3, NotChecked=174, Total=2162 [2022-11-25 15:38:49,824 INFO L87 Difference]: Start difference. First operand 547 states and 677 transitions. Second operand has 36 states, 33 states have (on average 4.575757575757576) internal successors, (151), 31 states have internal predecessors, (151), 15 states have call successors, (23), 6 states have call predecessors, (23), 10 states have return successors, (22), 14 states have call predecessors, (22), 15 states have call successors, (22) [2022-11-25 15:38:57,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:39:01,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:39:03,806 WARN L539 Checker$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 15:39:08,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:39:10,847 WARN L539 Checker$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 15:39:13,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:39:15,432 WARN L539 Checker$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 15:39:17,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:39:19,653 WARN L539 Checker$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 15:39:22,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:39:25,161 WARN L539 Checker$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 15:39:27,202 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 15:39:28,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:39:28,582 INFO L93 Difference]: Finished difference Result 1127 states and 1450 transitions. [2022-11-25 15:39:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 15:39:28,583 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 4.575757575757576) internal successors, (151), 31 states have internal predecessors, (151), 15 states have call successors, (23), 6 states have call predecessors, (23), 10 states have return successors, (22), 14 states have call predecessors, (22), 15 states have call successors, (22) Word has length 124 [2022-11-25 15:39:28,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:39:28,587 INFO L225 Difference]: With dead ends: 1127 [2022-11-25 15:39:28,587 INFO L226 Difference]: Without dead ends: 705 [2022-11-25 15:39:28,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 156 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=838, Invalid=6453, Unknown=27, NotChecked=338, Total=7656 [2022-11-25 15:39:28,591 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 988 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 4286 mSolverCounterSat, 511 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 5163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 4286 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:39:28,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1005 Valid, 1259 Invalid, 5163 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [511 Valid, 4286 Invalid, 12 Unknown, 354 Unchecked, 31.2s Time] [2022-11-25 15:39:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-11-25 15:39:28,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 589. [2022-11-25 15:39:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 449 states have (on average 1.1469933184855234) internal successors, (515), 460 states have internal predecessors, (515), 90 states have call successors, (90), 42 states have call predecessors, (90), 49 states have return successors, (118), 86 states have call predecessors, (118), 84 states have call successors, (118) [2022-11-25 15:39:28,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 723 transitions. [2022-11-25 15:39:28,744 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 723 transitions. Word has length 124 [2022-11-25 15:39:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:39:28,745 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 723 transitions. [2022-11-25 15:39:28,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 4.575757575757576) internal successors, (151), 31 states have internal predecessors, (151), 15 states have call successors, (23), 6 states have call predecessors, (23), 10 states have return successors, (22), 14 states have call predecessors, (22), 15 states have call successors, (22) [2022-11-25 15:39:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 723 transitions. [2022-11-25 15:39:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-25 15:39:28,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:39:28,746 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:39:28,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 15:39:28,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:28,951 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:39:28,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:39:28,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1394429517, now seen corresponding path program 1 times [2022-11-25 15:39:28,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:39:28,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545418454] [2022-11-25 15:39:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:28,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:39:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:29,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:39:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:29,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:39:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:29,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:39:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:29,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:39:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:29,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:39:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:29,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:39:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:29,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:39:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:29,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:39:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:29,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:39:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:29,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 15:39:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:29,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-11-25 15:39:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-25 15:39:29,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:39:29,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545418454] [2022-11-25 15:39:29,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545418454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:29,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017164950] [2022-11-25 15:39:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:39:29,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:39:29,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:39:29,572 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:39:29,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 15:39:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:39:30,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-25 15:39:30,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:39:30,161 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 15:39:30,471 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 15:39:30,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 15:39:30,484 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 15:39:30,714 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 15:39:30,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 15:39:31,143 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 15:39:31,144 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 15:39:31,258 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1532 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_1532) |c_#memory_int|)) is different from true [2022-11-25 15:39:31,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-25 15:39:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 34 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:39:36,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:39:36,468 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1535 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_1535) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 16)) 18446744073709551616) 0))) is different from false [2022-11-25 15:39:36,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017164950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:39:36,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:39:36,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 23] total 30 [2022-11-25 15:39:36,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112987880] [2022-11-25 15:39:36,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:39:36,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 15:39:36,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:39:36,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 15:39:36,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1017, Unknown=5, NotChecked=130, Total=1260 [2022-11-25 15:39:36,472 INFO L87 Difference]: Start difference. First operand 589 states and 723 transitions. Second operand has 30 states, 28 states have (on average 5.857142857142857) internal successors, (164), 26 states have internal predecessors, (164), 10 states have call successors, (23), 8 states have call predecessors, (23), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-25 15:39:47,534 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 15:39:55,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:39:59,874 WARN L539 Checker$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 15:40:04,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:40:06,979 WARN L539 Checker$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 15:40:09,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:40:11,924 WARN L539 Checker$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 15:40:14,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:40:16,361 WARN L539 Checker$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 15:40:18,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:40:22,271 WARN L539 Checker$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 15:40:26,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:40:28,487 WARN L539 Checker$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 15:40:30,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:40:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:40:31,363 INFO L93 Difference]: Finished difference Result 1435 states and 1754 transitions. [2022-11-25 15:40:31,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-25 15:40:31,364 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 5.857142857142857) internal successors, (164), 26 states have internal predecessors, (164), 10 states have call successors, (23), 8 states have call predecessors, (23), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 128 [2022-11-25 15:40:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:40:31,366 INFO L225 Difference]: With dead ends: 1435 [2022-11-25 15:40:31,367 INFO L226 Difference]: Without dead ends: 974 [2022-11-25 15:40:31,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 170 SyntacticMatches, 10 SemanticMatches, 101 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=1304, Invalid=8734, Unknown=70, NotChecked=398, Total=10506 [2022-11-25 15:40:31,371 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 742 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 4460 mSolverCounterSat, 328 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 5122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 4460 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 35.5s IncrementalHoareTripleChecker+Time [2022-11-25 15:40:31,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 1529 Invalid, 5122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 4460 Invalid, 24 Unknown, 310 Unchecked, 35.5s Time] [2022-11-25 15:40:31,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-11-25 15:40:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 858. [2022-11-25 15:40:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 665 states have (on average 1.1458646616541353) internal successors, (762), 689 states have internal predecessors, (762), 114 states have call successors, (114), 59 states have call predecessors, (114), 78 states have return successors, (148), 109 states have call predecessors, (148), 104 states have call successors, (148) [2022-11-25 15:40:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1024 transitions. [2022-11-25 15:40:31,541 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1024 transitions. Word has length 128 [2022-11-25 15:40:31,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:40:31,541 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 1024 transitions. [2022-11-25 15:40:31,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 5.857142857142857) internal successors, (164), 26 states have internal predecessors, (164), 10 states have call successors, (23), 8 states have call predecessors, (23), 8 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-25 15:40:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1024 transitions. [2022-11-25 15:40:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-25 15:40:31,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:40:31,544 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:40:31,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 15:40:31,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-25 15:40:31,754 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:40:31,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:40:31,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1542984964, now seen corresponding path program 1 times [2022-11-25 15:40:31,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:40:31,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332971608] [2022-11-25 15:40:31,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:40:31,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:40:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:33,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:40:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:33,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:40:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:33,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:40:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:33,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:40:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:33,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:40:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:33,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:40:33,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:33,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:40:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:33,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:40:33,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:33,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:40:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:33,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 15:40:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:33,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-25 15:40:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 15:40:33,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:40:33,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332971608] [2022-11-25 15:40:33,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332971608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:40:33,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297947311] [2022-11-25 15:40:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:40:33,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:40:33,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:40:33,546 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:40:33,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 15:40:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:40:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 2710 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-25 15:40:34,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:40:34,782 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1618 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_1618) |c_#memory_int|)) is different from true [2022-11-25 15:40:34,816 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 15:40:34,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-11-25 15:40:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:40:36,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:40:37,478 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1621 (Array Int Int)) (|ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| Int)) (let ((.cse1 (select (store |c_#memory_int| |ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.base| v_ArrVal_1621) |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.base|))) (let ((.cse0 (mod (select .cse1 (+ |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset| 16)) 18446744073709551616))) (or (= .cse0 0) (not (< .cse0 (mod (select .cse1 |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~buffer#1.offset|) 18446744073709551616))) (not (<= (mod (select v_ArrVal_1621 |c_ULTIMATE.start_aws_byte_buf_reserve_relative_~#requested_capacity~0#1.offset|) 18446744073709551616) .cse0)))))) is different from false [2022-11-25 15:40:37,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297947311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:40:37,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:40:37,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 24] total 31 [2022-11-25 15:40:37,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156433304] [2022-11-25 15:40:37,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:40:37,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 15:40:37,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:40:37,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 15:40:37,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1406, Unknown=5, NotChecked=154, Total=1722 [2022-11-25 15:40:37,483 INFO L87 Difference]: Start difference. First operand 858 states and 1024 transitions. Second operand has 31 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 26 states have internal predecessors, (144), 10 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-11-25 15:40:39,983 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 15:40:42,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:40:44,230 WARN L539 Checker$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 15:40:47,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:40:51,785 WARN L539 Checker$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 15:40:59,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:41:07,259 WARN L539 Checker$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 15:41:09,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:41:11,429 WARN L539 Checker$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 15:41:13,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:41:15,606 WARN L539 Checker$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 15:41:17,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:41:19,949 WARN L539 Checker$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 15:41:23,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:41:25,480 WARN L539 Checker$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 15:41:29,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:41:31,287 WARN L539 Checker$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 15:41:33,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:41:35,740 WARN L539 Checker$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 15:41:37,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:41:39,816 WARN L539 Checker$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 15:41:42,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:41:44,425 WARN L539 Checker$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 15:41:46,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:41:49,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:41:52,219 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 15:41:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:41:53,778 INFO L93 Difference]: Finished difference Result 2389 states and 2971 transitions. [2022-11-25 15:41:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-25 15:41:53,779 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 26 states have internal predecessors, (144), 10 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) Word has length 130 [2022-11-25 15:41:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:41:53,790 INFO L225 Difference]: With dead ends: 2389 [2022-11-25 15:41:53,790 INFO L226 Difference]: Without dead ends: 1804 [2022-11-25 15:41:53,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 183 SyntacticMatches, 5 SemanticMatches, 107 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3305 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1580, Invalid=9744, Unknown=26, NotChecked=422, Total=11772 [2022-11-25 15:41:53,796 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 1014 mSDsluCounter, 2491 mSDsCounter, 0 mSdLazyCounter, 6736 mSolverCounterSat, 768 mSolverCounterUnsat, 160 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 2775 SdHoareTripleChecker+Invalid, 8238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 6736 IncrementalHoareTripleChecker+Invalid, 160 IncrementalHoareTripleChecker+Unknown, 574 IncrementalHoareTripleChecker+Unchecked, 65.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:41:53,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1048 Valid, 2775 Invalid, 8238 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [768 Valid, 6736 Invalid, 160 Unknown, 574 Unchecked, 65.6s Time] [2022-11-25 15:41:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2022-11-25 15:41:54,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1516. [2022-11-25 15:41:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1186 states have (on average 1.145025295109612) internal successors, (1358), 1224 states have internal predecessors, (1358), 211 states have call successors, (211), 96 states have call predecessors, (211), 118 states have return successors, (265), 195 states have call predecessors, (265), 195 states have call successors, (265) [2022-11-25 15:41:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 1834 transitions. [2022-11-25 15:41:54,312 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 1834 transitions. Word has length 130 [2022-11-25 15:41:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:41:54,313 INFO L495 AbstractCegarLoop]: Abstraction has 1516 states and 1834 transitions. [2022-11-25 15:41:54,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 26 states have internal predecessors, (144), 10 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-11-25 15:41:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 1834 transitions. [2022-11-25 15:41:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-25 15:41:54,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:41:54,316 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:41:54,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 15:41:54,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-25 15:41:54,529 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:41:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:41:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash -590543802, now seen corresponding path program 1 times [2022-11-25 15:41:54,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:41:54,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931244391] [2022-11-25 15:41:54,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:41:54,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:41:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:59,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:41:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:59,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:41:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:59,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:41:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:59,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:41:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:59,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:41:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:59,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:41:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:41:59,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:41:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:00,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:42:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:00,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:42:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:00,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 15:42:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:00,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-25 15:42:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 15:42:01,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:42:01,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931244391] [2022-11-25 15:42:01,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931244391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:42:01,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947495653] [2022-11-25 15:42:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:42:01,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:42:01,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:42:01,323 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:42:01,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 15:42:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:42:02,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-25 15:42:02,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:42:02,134 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 15:42:02,736 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 15:42:02,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 15:42:02,754 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 15:42:04,014 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-25 15:42:04,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-25 15:42:04,526 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 15:42:04,526 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 15:42:04,771 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1709 (Array Int Int))) (= (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_1709) |c_#memory_int|)) is different from true [2022-11-25 15:42:04,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2022-11-25 15:42:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:42:20,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:42:23,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947495653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:42:23,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:42:23,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 43 [2022-11-25 15:42:23,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585613055] [2022-11-25 15:42:23,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:42:23,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 15:42:23,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:42:23,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 15:42:23,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2127, Unknown=35, NotChecked=94, Total=2450 [2022-11-25 15:42:23,787 INFO L87 Difference]: Start difference. First operand 1516 states and 1834 transitions. Second operand has 43 states, 40 states have (on average 4.375) internal successors, (175), 39 states have internal predecessors, (175), 14 states have call successors, (22), 9 states have call predecessors, (22), 12 states have return successors, (21), 11 states have call predecessors, (21), 13 states have call successors, (21) [2022-11-25 15:42:32,156 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 15:42:36,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:42:38,603 WARN L539 Checker$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 15:42:47,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:42:49,456 WARN L539 Checker$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 15:42:53,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:43:00,394 WARN L539 Checker$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 15:43:09,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:43:12,130 WARN L539 Checker$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 15:43:14,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:43:17,085 WARN L539 Checker$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 15:43:19,255 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 15:43:20,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:43:20,034 INFO L93 Difference]: Finished difference Result 2021 states and 2393 transitions. [2022-11-25 15:43:20,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-25 15:43:20,035 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 4.375) internal successors, (175), 39 states have internal predecessors, (175), 14 states have call successors, (22), 9 states have call predecessors, (22), 12 states have return successors, (21), 11 states have call predecessors, (21), 13 states have call successors, (21) Word has length 130 [2022-11-25 15:43:20,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:43:20,041 INFO L225 Difference]: With dead ends: 2021 [2022-11-25 15:43:20,041 INFO L226 Difference]: Without dead ends: 1772 [2022-11-25 15:43:20,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 182 SyntacticMatches, 12 SemanticMatches, 119 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4448 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=1793, Invalid=12429, Unknown=62, NotChecked=236, Total=14520 [2022-11-25 15:43:20,044 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 1298 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 6001 mSolverCounterSat, 594 mSolverCounterUnsat, 49 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 7092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 6001 IncrementalHoareTripleChecker+Invalid, 49 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 41.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:43:20,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1308 Valid, 1978 Invalid, 7092 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [594 Valid, 6001 Invalid, 49 Unknown, 448 Unchecked, 41.2s Time] [2022-11-25 15:43:20,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2022-11-25 15:43:20,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1624. [2022-11-25 15:43:20,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1285 states have (on average 1.1424124513618676) internal successors, (1468), 1327 states have internal predecessors, (1468), 214 states have call successors, (214), 101 states have call predecessors, (214), 124 states have return successors, (263), 195 states have call predecessors, (263), 198 states have call successors, (263) [2022-11-25 15:43:20,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 1945 transitions. [2022-11-25 15:43:20,674 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 1945 transitions. Word has length 130 [2022-11-25 15:43:20,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:43:20,674 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 1945 transitions. [2022-11-25 15:43:20,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 4.375) internal successors, (175), 39 states have internal predecessors, (175), 14 states have call successors, (22), 9 states have call predecessors, (22), 12 states have return successors, (21), 11 states have call predecessors, (21), 13 states have call successors, (21) [2022-11-25 15:43:20,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 1945 transitions. [2022-11-25 15:43:20,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-25 15:43:20,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:20,678 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:20,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 15:43:20,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:20,890 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:20,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:20,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1454197833, now seen corresponding path program 1 times [2022-11-25 15:43:20,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:20,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628682683] [2022-11-25 15:43:20,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:20,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:21,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:43:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:21,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:43:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:21,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:43:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:21,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:43:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:21,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:43:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:21,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:43:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:21,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:43:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:21,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:43:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:21,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:43:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:21,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 15:43:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:21,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-25 15:43:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-25 15:43:21,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:21,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628682683] [2022-11-25 15:43:21,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628682683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:43:21,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:43:21,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 15:43:21,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399524652] [2022-11-25 15:43:21,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:43:21,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:43:21,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:21,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:43:21,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:43:21,887 INFO L87 Difference]: Start difference. First operand 1624 states and 1945 transitions. Second operand has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-25 15:43:23,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:43:23,513 INFO L93 Difference]: Finished difference Result 1679 states and 2005 transitions. [2022-11-25 15:43:23,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 15:43:23,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 132 [2022-11-25 15:43:23,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:43:23,519 INFO L225 Difference]: With dead ends: 1679 [2022-11-25 15:43:23,519 INFO L226 Difference]: Without dead ends: 1677 [2022-11-25 15:43:23,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:43:23,521 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 152 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 15:43:23,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 955 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 15:43:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-11-25 15:43:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1641. [2022-11-25 15:43:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1297 states have (on average 1.141094834232845) internal successors, (1480), 1339 states have internal predecessors, (1480), 215 states have call successors, (215), 105 states have call predecessors, (215), 128 states have return successors, (264), 196 states have call predecessors, (264), 199 states have call successors, (264) [2022-11-25 15:43:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 1959 transitions. [2022-11-25 15:43:23,953 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 1959 transitions. Word has length 132 [2022-11-25 15:43:23,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:43:23,954 INFO L495 AbstractCegarLoop]: Abstraction has 1641 states and 1959 transitions. [2022-11-25 15:43:23,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-25 15:43:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 1959 transitions. [2022-11-25 15:43:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-25 15:43:23,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:43:23,957 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:43:23,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-25 15:43:23,958 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:43:23,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:43:23,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2082875853, now seen corresponding path program 1 times [2022-11-25 15:43:23,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:43:23,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220501093] [2022-11-25 15:43:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:23,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:43:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:26,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:43:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:26,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:43:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:26,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:43:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:27,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:43:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:27,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:43:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:27,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:43:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:27,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:43:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:27,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:43:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:27,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:43:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:27,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 15:43:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:27,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-25 15:43:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-25 15:43:27,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:43:27,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220501093] [2022-11-25 15:43:27,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220501093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:27,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410477869] [2022-11-25 15:43:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:43:27,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:43:27,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:43:27,791 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:43:27,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 15:43:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:43:28,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 2725 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-25 15:43:28,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:43:28,799 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 15:43:36,426 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1846 Int) (|aws_add_size_checked_aws_add_u64_checked_~r#1.base| Int)) (= (store |c_old(#memory_$Pointer$.base)| |aws_add_size_checked_aws_add_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_add_size_checked_aws_add_u64_checked_~r#1.base|) |c_aws_add_size_checked_#in~r#1.offset| v_ArrVal_1846)) |c_#memory_$Pointer$.base|)) is different from true [2022-11-25 15:43:36,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-25 15:43:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-25 15:43:41,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:43:45,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410477869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:43:45,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:43:45,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 30] total 48 [2022-11-25 15:43:45,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747114798] [2022-11-25 15:43:45,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:43:45,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-25 15:43:45,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:43:45,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-25 15:43:45,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3245, Unknown=3, NotChecked=114, Total=3540 [2022-11-25 15:43:45,617 INFO L87 Difference]: Start difference. First operand 1641 states and 1959 transitions. Second operand has 48 states, 44 states have (on average 3.5454545454545454) internal successors, (156), 40 states have internal predecessors, (156), 18 states have call successors, (24), 7 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 16 states have call successors, (22) [2022-11-25 15:44:00,449 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 15:44:04,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:44:08,872 WARN L539 Checker$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 15:44:19,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:44:21,946 WARN L539 Checker$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 15:44:24,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:44:28,710 WARN L539 Checker$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 15:44:31,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:44:42,938 WARN L539 Checker$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 15:44:50,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:44:52,584 WARN L539 Checker$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 15:44:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:44:57,154 INFO L93 Difference]: Finished difference Result 2585 states and 3115 transitions. [2022-11-25 15:44:57,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-25 15:44:57,155 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 44 states have (on average 3.5454545454545454) internal successors, (156), 40 states have internal predecessors, (156), 18 states have call successors, (24), 7 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 16 states have call successors, (22) Word has length 132 [2022-11-25 15:44:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:44:57,167 INFO L225 Difference]: With dead ends: 2585 [2022-11-25 15:44:57,168 INFO L226 Difference]: Without dead ends: 1912 [2022-11-25 15:44:57,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 164 SyntacticMatches, 7 SemanticMatches, 121 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3537 ImplicationChecksByTransitivity, 42.2s TimeCoverageRelationStatistics Valid=1354, Invalid=13404, Unknown=8, NotChecked=240, Total=15006 [2022-11-25 15:44:57,176 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 1230 mSDsluCounter, 3222 mSDsCounter, 0 mSdLazyCounter, 11709 mSolverCounterSat, 1082 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 13312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1082 IncrementalHoareTripleChecker+Valid, 11709 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 44.4s IncrementalHoareTripleChecker+Time [2022-11-25 15:44:57,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1239 Valid, 3394 Invalid, 13312 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1082 Valid, 11709 Invalid, 11 Unknown, 510 Unchecked, 44.4s Time] [2022-11-25 15:44:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2022-11-25 15:44:57,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1473. [2022-11-25 15:44:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1167 states have (on average 1.1388174807197944) internal successors, (1329), 1201 states have internal predecessors, (1329), 190 states have call successors, (190), 97 states have call predecessors, (190), 115 states have return successors, (226), 174 states have call predecessors, (226), 176 states have call successors, (226) [2022-11-25 15:44:57,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 1745 transitions. [2022-11-25 15:44:57,576 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 1745 transitions. Word has length 132 [2022-11-25 15:44:57,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:44:57,576 INFO L495 AbstractCegarLoop]: Abstraction has 1473 states and 1745 transitions. [2022-11-25 15:44:57,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 44 states have (on average 3.5454545454545454) internal successors, (156), 40 states have internal predecessors, (156), 18 states have call successors, (24), 7 states have call predecessors, (24), 11 states have return successors, (22), 17 states have call predecessors, (22), 16 states have call successors, (22) [2022-11-25 15:44:57,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 1745 transitions. [2022-11-25 15:44:57,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-25 15:44:57,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:44:57,580 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:44:57,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 15:44:57,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 15:44:57,793 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:44:57,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:44:57,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1207681231, now seen corresponding path program 1 times [2022-11-25 15:44:57,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:44:57,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148936740] [2022-11-25 15:44:57,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:57,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:44:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:44:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:44:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:44:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:44:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:44:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:44:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:44:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:44:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:44:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 15:44:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-25 15:44:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-25 15:44:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-25 15:44:58,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:44:58,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148936740] [2022-11-25 15:44:58,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148936740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:44:58,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365740666] [2022-11-25 15:44:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:44:58,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:44:58,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:44:58,659 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:44:58,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 15:44:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:44:59,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 2745 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 15:44:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:44:59,463 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 15:44:59,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:44:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-25 15:44:59,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365740666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:44:59,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:44:59,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 17 [2022-11-25 15:44:59,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455396608] [2022-11-25 15:44:59,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:44:59,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 15:44:59,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:44:59,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 15:44:59,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:44:59,841 INFO L87 Difference]: Start difference. First operand 1473 states and 1745 transitions. Second operand has 17 states, 16 states have (on average 6.25) internal successors, (100), 10 states have internal predecessors, (100), 3 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-25 15:45:01,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:45:01,629 INFO L93 Difference]: Finished difference Result 1647 states and 1927 transitions. [2022-11-25 15:45:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 15:45:01,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 6.25) internal successors, (100), 10 states have internal predecessors, (100), 3 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 3 states have call successors, (18) Word has length 136 [2022-11-25 15:45:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:45:01,637 INFO L225 Difference]: With dead ends: 1647 [2022-11-25 15:45:01,637 INFO L226 Difference]: Without dead ends: 1506 [2022-11-25 15:45:01,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 287 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-11-25 15:45:01,639 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 225 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:45:01,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 1189 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 15:45:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-11-25 15:45:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1469. [2022-11-25 15:45:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1165 states have (on average 1.136480686695279) internal successors, (1324), 1199 states have internal predecessors, (1324), 188 states have call successors, (188), 97 states have call predecessors, (188), 115 states have return successors, (224), 172 states have call predecessors, (224), 174 states have call successors, (224) [2022-11-25 15:45:02,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1736 transitions. [2022-11-25 15:45:02,033 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1736 transitions. Word has length 136 [2022-11-25 15:45:02,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:45:02,033 INFO L495 AbstractCegarLoop]: Abstraction has 1469 states and 1736 transitions. [2022-11-25 15:45:02,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 6.25) internal successors, (100), 10 states have internal predecessors, (100), 3 states have call successors, (20), 5 states have call predecessors, (20), 5 states have return successors, (18), 6 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-25 15:45:02,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1736 transitions. [2022-11-25 15:45:02,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 15:45:02,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:45:02,035 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:02,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-25 15:45:02,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-25 15:45:02,236 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:45:02,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:02,237 INFO L85 PathProgramCache]: Analyzing trace with hash -851598560, now seen corresponding path program 1 times [2022-11-25 15:45:02,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:02,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696512309] [2022-11-25 15:45:02,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:02,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:03,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:45:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:03,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:45:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:03,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:45:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:03,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:45:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:03,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:45:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:03,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:45:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:03,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:45:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:03,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:45:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:04,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:45:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:04,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 15:45:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:04,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-25 15:45:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:04,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-25 15:45:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:04,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-25 15:45:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 51 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 15:45:04,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:04,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696512309] [2022-11-25 15:45:04,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696512309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:04,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56564299] [2022-11-25 15:45:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:04,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:04,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:04,225 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:04,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 15:45:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:04,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 15:45:04,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:45:05,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:45:06,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56564299] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:06,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:45:06,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-11-25 15:45:06,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697721878] [2022-11-25 15:45:06,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:45:06,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 15:45:06,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:45:06,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 15:45:06,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-11-25 15:45:06,469 INFO L87 Difference]: Start difference. First operand 1469 states and 1736 transitions. Second operand has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 16 states have internal predecessors, (157), 8 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-11-25 15:45:08,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:45:11,104 WARN L539 Checker$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 15:45:13,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:45:16,173 WARN L539 Checker$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 15:45:18,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:45:20,925 WARN L539 Checker$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 15:45:23,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:45:25,110 WARN L539 Checker$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 15:45:29,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:45:31,494 WARN L539 Checker$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 15:45:33,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:45:35,629 WARN L539 Checker$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 15:45:37,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:45:40,283 WARN L539 Checker$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 15:45:42,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:45:44,692 WARN L539 Checker$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 15:45:47,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:45:49,145 WARN L539 Checker$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 15:45:51,320 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 15:45:51,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:45:51,544 INFO L93 Difference]: Finished difference Result 1617 states and 1893 transitions. [2022-11-25 15:45:51,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 15:45:51,545 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 16 states have internal predecessors, (157), 8 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 137 [2022-11-25 15:45:51,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:45:51,552 INFO L225 Difference]: With dead ends: 1617 [2022-11-25 15:45:51,552 INFO L226 Difference]: Without dead ends: 1567 [2022-11-25 15:45:51,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 208 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=363, Invalid=1436, Unknown=7, NotChecked=0, Total=1806 [2022-11-25 15:45:51,554 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 624 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 2643 mSolverCounterSat, 336 mSolverCounterUnsat, 82 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1337 SdHoareTripleChecker+Invalid, 3061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 2643 IncrementalHoareTripleChecker+Invalid, 82 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.2s IncrementalHoareTripleChecker+Time [2022-11-25 15:45:51,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 1337 Invalid, 3061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 2643 Invalid, 82 Unknown, 0 Unchecked, 43.2s Time] [2022-11-25 15:45:51,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2022-11-25 15:45:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1481. [2022-11-25 15:45:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1177 states have (on average 1.135089209855565) internal successors, (1336), 1210 states have internal predecessors, (1336), 188 states have call successors, (188), 98 states have call predecessors, (188), 115 states have return successors, (223), 172 states have call predecessors, (223), 174 states have call successors, (223) [2022-11-25 15:45:52,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 1747 transitions. [2022-11-25 15:45:52,150 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 1747 transitions. Word has length 137 [2022-11-25 15:45:52,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:45:52,150 INFO L495 AbstractCegarLoop]: Abstraction has 1481 states and 1747 transitions. [2022-11-25 15:45:52,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.476190476190476) internal successors, (157), 16 states have internal predecessors, (157), 8 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-11-25 15:45:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 1747 transitions. [2022-11-25 15:45:52,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-25 15:45:52,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:45:52,153 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:45:52,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 15:45:52,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:52,366 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:45:52,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:45:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1695604062, now seen corresponding path program 1 times [2022-11-25 15:45:52,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:45:52,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568068517] [2022-11-25 15:45:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:52,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:45:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:55,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:45:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:55,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:45:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:55,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:45:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:55,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:45:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:55,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:45:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:55,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:45:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:55,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:45:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:56,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:45:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:56,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:45:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:56,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 15:45:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:56,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-11-25 15:45:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:56,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-25 15:45:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:56,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-25 15:45:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 46 proven. 23 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-25 15:45:56,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:45:56,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568068517] [2022-11-25 15:45:56,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568068517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:45:56,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494442516] [2022-11-25 15:45:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:45:56,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:45:56,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:45:56,899 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:45:56,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 15:45:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:45:57,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 2722 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-25 15:45:57,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:45:57,723 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 15:45:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 61 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-25 15:45:59,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:46:01,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494442516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:46:01,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:46:01,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2022-11-25 15:46:01,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433848679] [2022-11-25 15:46:01,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:46:01,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 15:46:01,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:46:01,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 15:46:01,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 15:46:01,405 INFO L87 Difference]: Start difference. First operand 1481 states and 1747 transitions. Second operand has 28 states, 27 states have (on average 5.296296296296297) internal successors, (143), 25 states have internal predecessors, (143), 8 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-25 15:46:06,352 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 15:46:13,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:46:15,553 WARN L539 Checker$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 15:46:17,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:46:19,782 WARN L539 Checker$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 15:46:21,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:46:25,800 WARN L539 Checker$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 15:46:27,983 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 15:46:28,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:46:28,238 INFO L93 Difference]: Finished difference Result 1634 states and 1910 transitions. [2022-11-25 15:46:28,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 15:46:28,239 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.296296296296297) internal successors, (143), 25 states have internal predecessors, (143), 8 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 137 [2022-11-25 15:46:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:46:28,244 INFO L225 Difference]: With dead ends: 1634 [2022-11-25 15:46:28,244 INFO L226 Difference]: Without dead ends: 1594 [2022-11-25 15:46:28,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 200 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=630, Invalid=3252, Unknown=24, NotChecked=0, Total=3906 [2022-11-25 15:46:28,247 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 636 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 2798 mSolverCounterSat, 290 mSolverCounterUnsat, 44 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 3132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 2798 IncrementalHoareTripleChecker+Invalid, 44 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2022-11-25 15:46:28,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 1403 Invalid, 3132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 2798 Invalid, 44 Unknown, 0 Unchecked, 22.8s Time] [2022-11-25 15:46:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2022-11-25 15:46:28,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1461. [2022-11-25 15:46:28,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1159 states have (on average 1.1337359792924935) internal successors, (1314), 1191 states have internal predecessors, (1314), 188 states have call successors, (188), 97 states have call predecessors, (188), 113 states have return successors, (221), 172 states have call predecessors, (221), 174 states have call successors, (221) [2022-11-25 15:46:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 1723 transitions. [2022-11-25 15:46:28,862 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 1723 transitions. Word has length 137 [2022-11-25 15:46:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:46:28,862 INFO L495 AbstractCegarLoop]: Abstraction has 1461 states and 1723 transitions. [2022-11-25 15:46:28,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.296296296296297) internal successors, (143), 25 states have internal predecessors, (143), 8 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2022-11-25 15:46:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 1723 transitions. [2022-11-25 15:46:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-25 15:46:28,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:46:28,865 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:46:28,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 15:46:29,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:46:29,071 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:46:29,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:46:29,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1853666961, now seen corresponding path program 1 times [2022-11-25 15:46:29,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:46:29,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325644778] [2022-11-25 15:46:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:29,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:46:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:30,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 15:46:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:30,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 15:46:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:30,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:46:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:30,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:46:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:30,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-25 15:46:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:30,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-25 15:46:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:30,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-25 15:46:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:30,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-11-25 15:46:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:30,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-25 15:46:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:30,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 15:46:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:30,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-11-25 15:46:30,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:30,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-25 15:46:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 64 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 15:46:30,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:46:30,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325644778] [2022-11-25 15:46:30,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325644778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:46:30,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075700824] [2022-11-25 15:46:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:46:30,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:46:30,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:46:30,884 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:46:30,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f026ba6a-867a-4fb6-8331-8b4eaed02b26/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 15:46:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:46:31,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 2760 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-25 15:46:31,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:46:32,498 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2141 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| v_ArrVal_2141))) is different from true [2022-11-25 15:46:32,526 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 15:46:32,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 31 [2022-11-25 15:46:32,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 15:46:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 25 proven. 57 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 15:46:33,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:46:34,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075700824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:46:34,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:46:34,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 29 [2022-11-25 15:46:34,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948198878] [2022-11-25 15:46:34,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:46:34,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 15:46:34,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:46:34,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 15:46:34,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1117, Unknown=5, NotChecked=68, Total=1332 [2022-11-25 15:46:34,800 INFO L87 Difference]: Start difference. First operand 1461 states and 1723 transitions. Second operand has 29 states, 29 states have (on average 5.413793103448276) internal successors, (157), 25 states have internal predecessors, (157), 10 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-25 15:46:37,605 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 15:46:39,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:46:42,010 WARN L539 Checker$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 15:46:45,848 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]