./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a --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 156ab79a85c4b985ced0d661dede185c573e9f8e4fcba49b00d62d883c71bbed --- 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-b5237d8 [2022-11-21 16:59:07,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:59:07,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:59:07,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:59:07,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:59:07,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:59:07,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:59:07,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:59:07,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:59:07,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:59:07,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:59:07,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:59:07,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:59:07,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:59:07,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:59:07,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:59:07,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:59:07,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:59:07,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:59:07,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:59:07,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:59:07,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:59:07,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:59:07,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:59:07,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:59:07,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:59:07,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:59:07,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:59:07,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:59:07,411 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:59:07,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:59:07,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:59:07,413 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:59:07,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:59:07,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:59:07,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:59:07,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:59:07,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:59:07,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:59:07,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:59:07,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:59:07,431 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-21 16:59:07,461 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:59:07,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:59:07,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:59:07,462 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:59:07,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:59:07,464 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:59:07,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:59:07,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:59:07,465 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:59:07,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:59:07,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:59:07,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:59:07,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:59:07,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:59:07,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:59:07,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:59:07,467 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:59:07,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:59:07,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:59:07,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:59:07,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:59:07,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:59:07,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:59:07,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:59:07,469 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:59:07,469 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:59:07,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:59:07,470 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:59:07,470 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:59:07,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:59:07,470 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 156ab79a85c4b985ced0d661dede185c573e9f8e4fcba49b00d62d883c71bbed [2022-11-21 16:59:07,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:59:07,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:59:07,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:59:07,823 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:59:07,823 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:59:07,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i [2022-11-21 16:59:10,807 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:59:11,383 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:59:11,384 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i [2022-11-21 16:59:11,423 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/data/a2e1c27f9/cc52c2fee54d4607b6cba00c2c0327ff/FLAG73ee01f6d [2022-11-21 16:59:11,438 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/data/a2e1c27f9/cc52c2fee54d4607b6cba00c2c0327ff [2022-11-21 16:59:11,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:59:11,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:59:11,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:59:11,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:59:11,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:59:11,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:59:11" (1/1) ... [2022-11-21 16:59:11,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e542bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:11, skipping insertion in model container [2022-11-21 16:59:11,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:59:11" (1/1) ... [2022-11-21 16:59:11,489 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:59:11,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:59:11,899 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_59a00213-06ad-42da-a88e-51e515964e99/sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i[4495,4508] [2022-11-21 16:59:11,909 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_59a00213-06ad-42da-a88e-51e515964e99/sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i[4555,4568] [2022-11-21 16:59:12,845 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-21 16:59:12,946 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:12,947 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:12,947 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:12,949 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:12,950 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:12,968 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:12,970 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:12,972 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:12,972 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:12,974 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:12,975 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:12,976 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:12,977 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,462 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-21 16:59:13,464 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-21 16:59:13,467 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-21 16:59:13,469 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-21 16:59:13,471 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-21 16:59:13,472 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-21 16:59:13,473 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-21 16:59:13,474 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-21 16:59:13,475 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-21 16:59:13,475 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-21 16:59:13,702 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,721 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,772 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,773 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,773 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:59:13,804 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:59:13,818 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_59a00213-06ad-42da-a88e-51e515964e99/sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i[4495,4508] [2022-11-21 16:59:13,819 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_59a00213-06ad-42da-a88e-51e515964e99/sv-benchmarks/c/aws-c-common/aws_array_list_set_at_harness.i[4555,4568] [2022-11-21 16:59:13,854 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-21 16:59:13,877 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,877 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,878 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,878 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,879 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,887 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,887 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,889 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,889 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,891 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,891 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,892 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,892 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:13,936 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-21 16:59:13,940 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-21 16:59:13,942 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-21 16:59:13,943 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-21 16:59:13,944 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-21 16:59:13,947 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-21 16:59:13,950 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-21 16:59:13,951 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-21 16:59:13,951 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-21 16:59:13,952 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-21 16:59:14,022 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:14,028 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:14,067 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:14,073 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:14,074 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-21 16:59:14,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:59:14,376 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:59:14,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:14 WrapperNode [2022-11-21 16:59:14,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:59:14,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:59:14,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:59:14,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:59:14,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:14" (1/1) ... [2022-11-21 16:59:14,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:14" (1/1) ... [2022-11-21 16:59:14,586 INFO L138 Inliner]: procedures = 691, calls = 1680, calls flagged for inlining = 51, calls inlined = 11, statements flattened = 846 [2022-11-21 16:59:14,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:59:14,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:59:14,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:59:14,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:59:14,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:14" (1/1) ... [2022-11-21 16:59:14,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:14" (1/1) ... [2022-11-21 16:59:14,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:14" (1/1) ... [2022-11-21 16:59:14,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:14" (1/1) ... [2022-11-21 16:59:14,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:14" (1/1) ... [2022-11-21 16:59:14,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:14" (1/1) ... [2022-11-21 16:59:14,696 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:14" (1/1) ... [2022-11-21 16:59:14,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:14" (1/1) ... [2022-11-21 16:59:14,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:59:14,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:59:14,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:59:14,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:59:14,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:14" (1/1) ... [2022-11-21 16:59:14,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:59:14,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:14,755 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:59:14,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:59:14,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:59:14,798 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2022-11-21 16:59:14,798 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2022-11-21 16:59:14,799 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2022-11-21 16:59:14,799 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2022-11-21 16:59:14,799 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-21 16:59:14,800 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-21 16:59:14,800 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2022-11-21 16:59:14,800 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2022-11-21 16:59:14,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:59:14,801 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-21 16:59:14,802 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-21 16:59:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-21 16:59:14,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-21 16:59:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:59:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:59:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-21 16:59:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2022-11-21 16:59:14,803 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2022-11-21 16:59:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:59:14,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:59:14,804 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-21 16:59:14,804 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-21 16:59:14,804 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-11-21 16:59:14,805 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-11-21 16:59:14,805 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2022-11-21 16:59:14,805 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2022-11-21 16:59:14,805 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2022-11-21 16:59:14,805 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2022-11-21 16:59:14,806 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-11-21 16:59:14,806 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-11-21 16:59:14,806 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2022-11-21 16:59:14,806 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2022-11-21 16:59:14,806 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-21 16:59:14,806 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-21 16:59:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2022-11-21 16:59:14,807 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2022-11-21 16:59:14,807 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2022-11-21 16:59:14,807 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2022-11-21 16:59:14,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:59:14,808 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2022-11-21 16:59:14,808 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2022-11-21 16:59:14,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-21 16:59:14,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-21 16:59:14,808 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-21 16:59:14,809 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-21 16:59:14,809 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2022-11-21 16:59:14,809 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2022-11-21 16:59:14,810 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2022-11-21 16:59:14,810 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2022-11-21 16:59:14,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:59:14,810 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2022-11-21 16:59:14,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2022-11-21 16:59:14,810 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_set_at [2022-11-21 16:59:14,811 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_set_at [2022-11-21 16:59:14,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:59:15,203 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:59:15,207 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:59:16,595 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:59:16,617 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:59:16,618 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-21 16:59:16,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:59:16 BoogieIcfgContainer [2022-11-21 16:59:16,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:59:16,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:59:16,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:59:16,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:59:16,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:59:11" (1/3) ... [2022-11-21 16:59:16,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eacb5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:59:16, skipping insertion in model container [2022-11-21 16:59:16,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:59:14" (2/3) ... [2022-11-21 16:59:16,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eacb5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:59:16, skipping insertion in model container [2022-11-21 16:59:16,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:59:16" (3/3) ... [2022-11-21 16:59:16,642 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_list_set_at_harness.i [2022-11-21 16:59:16,662 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:59:16,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:59:16,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:59:16,752 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;@6bb43c1c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:59:16,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-21 16:59:16,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 281 states, 164 states have (on average 1.2195121951219512) internal successors, (200), 165 states have internal predecessors, (200), 93 states have call successors, (93), 22 states have call predecessors, (93), 22 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2022-11-21 16:59:16,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-21 16:59:16,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:16,782 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:16,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:16,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:16,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1870768140, now seen corresponding path program 1 times [2022-11-21 16:59:16,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:16,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660240840] [2022-11-21 16:59:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:16,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:17,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-21 16:59:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:17,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-21 16:59:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:17,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 16:59:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:17,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-21 16:59:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:17,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-21 16:59:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:17,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-21 16:59:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:17,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-21 16:59:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:17,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-21 16:59:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-21 16:59:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-21 16:59:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 16:59:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-11-21 16:59:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-21 16:59:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-11-21 16:59:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-21 16:59:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-21 16:59:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-11-21 16:59:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-11-21 16:59:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-11-21 16:59:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-11-21 16:59:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-11-21 16:59:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-11-21 16:59:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-11-21 16:59:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-11-21 16:59:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-11-21 16:59:18,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:18,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660240840] [2022-11-21 16:59:18,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660240840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:59:18,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254054297] [2022-11-21 16:59:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:18,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:18,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:18,211 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:18,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:59:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:18,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 2431 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:59:18,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-21 16:59:19,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:59:19,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254054297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:19,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:59:19,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-11-21 16:59:19,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012671945] [2022-11-21 16:59:19,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:19,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:59:19,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:19,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:59:19,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:59:19,047 INFO L87 Difference]: Start difference. First operand has 281 states, 164 states have (on average 1.2195121951219512) internal successors, (200), 165 states have internal predecessors, (200), 93 states have call successors, (93), 22 states have call predecessors, (93), 22 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-21 16:59:19,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:19,585 INFO L93 Difference]: Finished difference Result 557 states and 840 transitions. [2022-11-21 16:59:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:59:19,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 146 [2022-11-21 16:59:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:19,613 INFO L225 Difference]: With dead ends: 557 [2022-11-21 16:59:19,614 INFO L226 Difference]: Without dead ends: 278 [2022-11-21 16:59:19,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:59:19,630 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 386 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:19,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 1217 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:59:19,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-21 16:59:19,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2022-11-21 16:59:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 161 states have (on average 1.2111801242236024) internal successors, (195), 163 states have internal predecessors, (195), 93 states have call successors, (93), 22 states have call predecessors, (93), 23 states have return successors, (108), 92 states have call predecessors, (108), 92 states have call successors, (108) [2022-11-21 16:59:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 396 transitions. [2022-11-21 16:59:19,746 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 396 transitions. Word has length 146 [2022-11-21 16:59:19,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:19,746 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 396 transitions. [2022-11-21 16:59:19,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-21 16:59:19,747 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 396 transitions. [2022-11-21 16:59:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-21 16:59:19,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:19,757 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:19,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:19,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-21 16:59:19,967 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:19,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:19,968 INFO L85 PathProgramCache]: Analyzing trace with hash 265363754, now seen corresponding path program 1 times [2022-11-21 16:59:19,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:19,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236006644] [2022-11-21 16:59:19,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:19,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:20,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:59:20,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200742578] [2022-11-21 16:59:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:20,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:20,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:20,073 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:20,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:59:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:20,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 2703 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-21 16:59:20,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-11-21 16:59:20,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:59:20,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:20,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236006644] [2022-11-21 16:59:20,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:59:20,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200742578] [2022-11-21 16:59:20,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200742578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:20,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:20,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 16:59:20,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139537958] [2022-11-21 16:59:20,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:20,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:59:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:59:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:59:20,834 INFO L87 Difference]: Start difference. First operand 278 states and 396 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-21 16:59:20,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:20,887 INFO L93 Difference]: Finished difference Result 535 states and 784 transitions. [2022-11-21 16:59:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:59:20,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 176 [2022-11-21 16:59:20,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:20,891 INFO L225 Difference]: With dead ends: 535 [2022-11-21 16:59:20,891 INFO L226 Difference]: Without dead ends: 283 [2022-11-21 16:59:20,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:59:20,893 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 10 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:20,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1124 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:59:20,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-21 16:59:20,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2022-11-21 16:59:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 163 states have (on average 1.2085889570552146) internal successors, (197), 165 states have internal predecessors, (197), 93 states have call successors, (93), 22 states have call predecessors, (93), 23 states have return successors, (108), 92 states have call predecessors, (108), 92 states have call successors, (108) [2022-11-21 16:59:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 398 transitions. [2022-11-21 16:59:20,935 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 398 transitions. Word has length 176 [2022-11-21 16:59:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:20,937 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 398 transitions. [2022-11-21 16:59:20,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2022-11-21 16:59:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 398 transitions. [2022-11-21 16:59:20,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-21 16:59:20,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:20,941 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:20,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:21,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-21 16:59:21,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:21,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:21,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1664860694, now seen corresponding path program 1 times [2022-11-21 16:59:21,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:21,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095151363] [2022-11-21 16:59:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:21,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:21,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:59:21,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736889042] [2022-11-21 16:59:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:21,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:21,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:21,242 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:21,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:59:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:21,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 2713 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:59:21,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-11-21 16:59:21,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:59:21,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:21,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095151363] [2022-11-21 16:59:21,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:59:21,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736889042] [2022-11-21 16:59:21,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736889042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:21,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:21,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-21 16:59:21,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485216464] [2022-11-21 16:59:21,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:22,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:59:22,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:22,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:59:22,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:59:22,001 INFO L87 Difference]: Start difference. First operand 280 states and 398 transitions. Second operand has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2022-11-21 16:59:22,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:22,677 INFO L93 Difference]: Finished difference Result 512 states and 726 transitions. [2022-11-21 16:59:22,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:59:22,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) Word has length 176 [2022-11-21 16:59:22,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:22,683 INFO L225 Difference]: With dead ends: 512 [2022-11-21 16:59:22,683 INFO L226 Difference]: Without dead ends: 280 [2022-11-21 16:59:22,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:59:22,687 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 444 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:22,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1529 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 16:59:22,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-21 16:59:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-11-21 16:59:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 163 states have (on average 1.2085889570552146) internal successors, (197), 165 states have internal predecessors, (197), 93 states have call successors, (93), 22 states have call predecessors, (93), 23 states have return successors, (104), 92 states have call predecessors, (104), 92 states have call successors, (104) [2022-11-21 16:59:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 394 transitions. [2022-11-21 16:59:22,725 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 394 transitions. Word has length 176 [2022-11-21 16:59:22,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:22,728 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 394 transitions. [2022-11-21 16:59:22,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 4 states have call successors, (26) [2022-11-21 16:59:22,728 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 394 transitions. [2022-11-21 16:59:22,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-21 16:59:22,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:22,731 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:22,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-21 16:59:22,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:22,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:22,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:22,943 INFO L85 PathProgramCache]: Analyzing trace with hash -331838195, now seen corresponding path program 2 times [2022-11-21 16:59:22,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:22,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394237189] [2022-11-21 16:59:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:22,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:23,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:59:23,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846013411] [2022-11-21 16:59:23,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:59:23,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:23,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:23,038 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:23,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:59:23,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:59:23,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:59:23,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 1914 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:59:23,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-21 16:59:23,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:59:23,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:23,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394237189] [2022-11-21 16:59:23,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:59:23,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846013411] [2022-11-21 16:59:23,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846013411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:23,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:23,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:59:23,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273106416] [2022-11-21 16:59:23,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:23,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:59:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:59:23,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:59:23,662 INFO L87 Difference]: Start difference. First operand 280 states and 394 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-21 16:59:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:23,714 INFO L93 Difference]: Finished difference Result 494 states and 684 transitions. [2022-11-21 16:59:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:59:23,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) Word has length 191 [2022-11-21 16:59:23,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:23,720 INFO L225 Difference]: With dead ends: 494 [2022-11-21 16:59:23,720 INFO L226 Difference]: Without dead ends: 285 [2022-11-21 16:59:23,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:59:23,725 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 2 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:23,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1497 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:59:23,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-21 16:59:23,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-11-21 16:59:23,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 169 states have internal predecessors, (201), 93 states have call successors, (93), 22 states have call predecessors, (93), 24 states have return successors, (106), 93 states have call predecessors, (106), 92 states have call successors, (106) [2022-11-21 16:59:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 400 transitions. [2022-11-21 16:59:23,750 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 400 transitions. Word has length 191 [2022-11-21 16:59:23,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:23,751 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 400 transitions. [2022-11-21 16:59:23,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-21 16:59:23,752 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 400 transitions. [2022-11-21 16:59:23,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-11-21 16:59:23,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:23,756 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:23,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:23,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:23,971 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:23,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1595114899, now seen corresponding path program 1 times [2022-11-21 16:59:23,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:23,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324827705] [2022-11-21 16:59:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:23,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:24,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:59:24,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087231413] [2022-11-21 16:59:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:24,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:24,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:24,054 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:24,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:59:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:24,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 2858 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:59:24,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-11-21 16:59:24,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:59:24,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:24,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324827705] [2022-11-21 16:59:24,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:59:24,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087231413] [2022-11-21 16:59:24,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087231413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:24,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:24,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 16:59:24,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894176990] [2022-11-21 16:59:24,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:24,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:59:24,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:24,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:59:24,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:59:24,867 INFO L87 Difference]: Start difference. First operand 285 states and 400 transitions. Second operand has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 5 states have call successors, (27) [2022-11-21 16:59:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:25,662 INFO L93 Difference]: Finished difference Result 516 states and 720 transitions. [2022-11-21 16:59:25,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:59:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 5 states have call successors, (27) Word has length 197 [2022-11-21 16:59:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:25,665 INFO L225 Difference]: With dead ends: 516 [2022-11-21 16:59:25,665 INFO L226 Difference]: Without dead ends: 285 [2022-11-21 16:59:25,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-21 16:59:25,667 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 494 mSDsluCounter, 1418 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 1700 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:25,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 1700 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 16:59:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-21 16:59:25,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-11-21 16:59:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 169 states have internal predecessors, (201), 93 states have call successors, (93), 22 states have call predecessors, (93), 24 states have return successors, (100), 93 states have call predecessors, (100), 92 states have call successors, (100) [2022-11-21 16:59:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 394 transitions. [2022-11-21 16:59:25,687 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 394 transitions. Word has length 197 [2022-11-21 16:59:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:25,688 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 394 transitions. [2022-11-21 16:59:25,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 5 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (27), 4 states have call predecessors, (27), 5 states have call successors, (27) [2022-11-21 16:59:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 394 transitions. [2022-11-21 16:59:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-21 16:59:25,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:25,692 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:25,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:25,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:25,904 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:25,905 INFO L85 PathProgramCache]: Analyzing trace with hash -895724094, now seen corresponding path program 2 times [2022-11-21 16:59:25,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:25,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238217176] [2022-11-21 16:59:25,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:25,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:25,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:59:25,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [524669780] [2022-11-21 16:59:25,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:59:25,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:25,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:25,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:25,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:59:26,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:59:26,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:59:26,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 2999 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 16:59:27,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-11-21 16:59:27,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:59:27,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:27,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238217176] [2022-11-21 16:59:27,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:59:27,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524669780] [2022-11-21 16:59:27,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524669780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:27,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:27,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-21 16:59:27,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250673890] [2022-11-21 16:59:27,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:27,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:59:27,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:27,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:59:27,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:59:27,169 INFO L87 Difference]: Start difference. First operand 285 states and 394 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2022-11-21 16:59:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:28,030 INFO L93 Difference]: Finished difference Result 513 states and 703 transitions. [2022-11-21 16:59:28,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:59:28,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) Word has length 212 [2022-11-21 16:59:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:28,034 INFO L225 Difference]: With dead ends: 513 [2022-11-21 16:59:28,034 INFO L226 Difference]: Without dead ends: 285 [2022-11-21 16:59:28,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:59:28,036 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 542 mSDsluCounter, 1620 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:28,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1901 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 16:59:28,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-21 16:59:28,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-11-21 16:59:28,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 169 states have internal predecessors, (201), 93 states have call successors, (93), 22 states have call predecessors, (93), 24 states have return successors, (96), 93 states have call predecessors, (96), 92 states have call successors, (96) [2022-11-21 16:59:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 390 transitions. [2022-11-21 16:59:28,058 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 390 transitions. Word has length 212 [2022-11-21 16:59:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:28,058 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 390 transitions. [2022-11-21 16:59:28,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 9 states have internal predecessors, (70), 6 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 6 states have call predecessors, (27), 5 states have call successors, (27) [2022-11-21 16:59:28,059 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 390 transitions. [2022-11-21 16:59:28,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-21 16:59:28,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:28,064 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:28,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:28,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:28,275 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:28,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:28,276 INFO L85 PathProgramCache]: Analyzing trace with hash 247081526, now seen corresponding path program 1 times [2022-11-21 16:59:28,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:28,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45181063] [2022-11-21 16:59:28,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:28,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:28,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:59:28,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046698653] [2022-11-21 16:59:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:28,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:28,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:28,366 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:28,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:59:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:29,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 3281 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:59:29,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-11-21 16:59:29,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:59:29,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:29,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45181063] [2022-11-21 16:59:29,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:59:29,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046698653] [2022-11-21 16:59:29,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046698653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:29,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:29,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-21 16:59:29,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514735026] [2022-11-21 16:59:29,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:29,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:59:29,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:29,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:59:29,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:59:29,263 INFO L87 Difference]: Start difference. First operand 285 states and 390 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) [2022-11-21 16:59:29,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:29,555 INFO L93 Difference]: Finished difference Result 646 states and 908 transitions. [2022-11-21 16:59:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:59:29,556 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) Word has length 242 [2022-11-21 16:59:29,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:29,559 INFO L225 Difference]: With dead ends: 646 [2022-11-21 16:59:29,559 INFO L226 Difference]: Without dead ends: 412 [2022-11-21 16:59:29,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:59:29,561 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 133 mSDsluCounter, 2886 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 3317 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:29,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 3317 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:59:29,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-11-21 16:59:29,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388. [2022-11-21 16:59:29,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 223 states have (on average 1.2152466367713004) internal successors, (271), 225 states have internal predecessors, (271), 138 states have call successors, (138), 23 states have call predecessors, (138), 26 states have return successors, (145), 139 states have call predecessors, (145), 137 states have call successors, (145) [2022-11-21 16:59:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 554 transitions. [2022-11-21 16:59:29,606 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 554 transitions. Word has length 242 [2022-11-21 16:59:29,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:29,607 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 554 transitions. [2022-11-21 16:59:29,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 5 states have call predecessors, (29), 4 states have call successors, (29) [2022-11-21 16:59:29,608 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 554 transitions. [2022-11-21 16:59:29,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-21 16:59:29,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:29,612 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:29,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:29,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:29,825 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:29,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:29,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1060060872, now seen corresponding path program 1 times [2022-11-21 16:59:29,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:29,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047395262] [2022-11-21 16:59:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:29,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:29,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:59:29,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343776817] [2022-11-21 16:59:29,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:29,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:29,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:29,931 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:29,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:59:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:30,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 3278 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 16:59:30,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-11-21 16:59:30,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:59:30,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:30,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047395262] [2022-11-21 16:59:30,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:59:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343776817] [2022-11-21 16:59:30,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343776817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:30,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:30,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 16:59:30,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835699050] [2022-11-21 16:59:30,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:30,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:59:30,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:30,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:59:30,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:59:30,817 INFO L87 Difference]: Start difference. First operand 388 states and 554 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2022-11-21 16:59:31,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:31,176 INFO L93 Difference]: Finished difference Result 827 states and 1198 transitions. [2022-11-21 16:59:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:59:31,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 242 [2022-11-21 16:59:31,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:31,181 INFO L225 Difference]: With dead ends: 827 [2022-11-21 16:59:31,181 INFO L226 Difference]: Without dead ends: 500 [2022-11-21 16:59:31,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:59:31,185 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 129 mSDsluCounter, 2435 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 2973 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:31,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 2973 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:59:31,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-11-21 16:59:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 478. [2022-11-21 16:59:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 270 states have (on average 1.2185185185185186) internal successors, (329), 272 states have internal predecessors, (329), 180 states have call successors, (180), 24 states have call predecessors, (180), 27 states have return successors, (189), 181 states have call predecessors, (189), 179 states have call successors, (189) [2022-11-21 16:59:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 698 transitions. [2022-11-21 16:59:31,260 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 698 transitions. Word has length 242 [2022-11-21 16:59:31,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:31,261 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 698 transitions. [2022-11-21 16:59:31,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2022-11-21 16:59:31,262 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 698 transitions. [2022-11-21 16:59:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-21 16:59:31,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:31,267 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:31,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:31,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:31,480 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:31,480 INFO L85 PathProgramCache]: Analyzing trace with hash -642172170, now seen corresponding path program 1 times [2022-11-21 16:59:31,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:31,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584429655] [2022-11-21 16:59:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:31,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:31,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:59:31,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495270176] [2022-11-21 16:59:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:31,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:31,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:31,586 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:31,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:59:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:32,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 3275 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-21 16:59:32,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 282 proven. 1 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-11-21 16:59:32,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:59:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2022-11-21 16:59:32,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:32,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584429655] [2022-11-21 16:59:32,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:59:32,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495270176] [2022-11-21 16:59:32,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495270176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:59:32,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:59:32,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2022-11-21 16:59:32,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610280996] [2022-11-21 16:59:32,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:59:32,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:59:32,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:32,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:59:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:59:32,874 INFO L87 Difference]: Start difference. First operand 478 states and 698 transitions. Second operand has 11 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 4 states have call successors, (43), 3 states have call predecessors, (43), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2022-11-21 16:59:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:33,211 INFO L93 Difference]: Finished difference Result 634 states and 884 transitions. [2022-11-21 16:59:33,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:59:33,212 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 4 states have call successors, (43), 3 states have call predecessors, (43), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) Word has length 242 [2022-11-21 16:59:33,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:33,214 INFO L225 Difference]: With dead ends: 634 [2022-11-21 16:59:33,214 INFO L226 Difference]: Without dead ends: 289 [2022-11-21 16:59:33,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:59:33,217 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 3 mSDsluCounter, 2379 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:33,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2732 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:59:33,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-21 16:59:33,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2022-11-21 16:59:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 169 states have (on average 1.1893491124260356) internal successors, (201), 172 states have internal predecessors, (201), 93 states have call successors, (93), 22 states have call predecessors, (93), 25 states have return successors, (97), 93 states have call predecessors, (97), 92 states have call successors, (97) [2022-11-21 16:59:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 391 transitions. [2022-11-21 16:59:33,242 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 391 transitions. Word has length 242 [2022-11-21 16:59:33,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:33,243 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 391 transitions. [2022-11-21 16:59:33,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 4 states have call successors, (43), 3 states have call predecessors, (43), 4 states have return successors, (41), 3 states have call predecessors, (41), 3 states have call successors, (41) [2022-11-21 16:59:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 391 transitions. [2022-11-21 16:59:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-11-21 16:59:33,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:33,245 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:33,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:33,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:33,458 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:33,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:33,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2101338209, now seen corresponding path program 1 times [2022-11-21 16:59:33,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:33,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373514644] [2022-11-21 16:59:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:33,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:33,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:59:33,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879911490] [2022-11-21 16:59:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:33,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:33,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:33,554 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:33,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:59:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:34,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 3316 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-21 16:59:34,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 242 proven. 0 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-11-21 16:59:35,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:59:35,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:35,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373514644] [2022-11-21 16:59:35,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:59:35,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879911490] [2022-11-21 16:59:35,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879911490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:35,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:35,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-21 16:59:35,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298482392] [2022-11-21 16:59:35,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:35,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 16:59:35,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:35,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 16:59:35,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-21 16:59:35,029 INFO L87 Difference]: Start difference. First operand 288 states and 391 transitions. Second operand has 13 states, 12 states have (on average 7.75) internal successors, (93), 12 states have internal predecessors, (93), 6 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 6 states have call successors, (31) [2022-11-21 16:59:38,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:38,901 INFO L93 Difference]: Finished difference Result 806 states and 1163 transitions. [2022-11-21 16:59:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 16:59:38,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.75) internal successors, (93), 12 states have internal predecessors, (93), 6 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 6 states have call successors, (31) Word has length 253 [2022-11-21 16:59:38,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:38,905 INFO L225 Difference]: With dead ends: 806 [2022-11-21 16:59:38,906 INFO L226 Difference]: Without dead ends: 544 [2022-11-21 16:59:38,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 239 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:59:38,909 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 344 mSDsluCounter, 3149 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 3656 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:38,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 3656 Invalid, 2195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2126 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-21 16:59:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-11-21 16:59:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 527. [2022-11-21 16:59:39,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 308 states have (on average 1.1948051948051948) internal successors, (368), 314 states have internal predecessors, (368), 171 states have call successors, (171), 42 states have call predecessors, (171), 47 states have return successors, (234), 170 states have call predecessors, (234), 169 states have call successors, (234) [2022-11-21 16:59:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 773 transitions. [2022-11-21 16:59:39,028 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 773 transitions. Word has length 253 [2022-11-21 16:59:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:39,029 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 773 transitions. [2022-11-21 16:59:39,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.75) internal successors, (93), 12 states have internal predecessors, (93), 6 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 6 states have call successors, (31) [2022-11-21 16:59:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 773 transitions. [2022-11-21 16:59:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-11-21 16:59:39,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:39,032 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:39,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:39,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:59:39,244 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:39,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1747084271, now seen corresponding path program 1 times [2022-11-21 16:59:39,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:39,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248454275] [2022-11-21 16:59:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:39,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:39,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:59:39,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523535464] [2022-11-21 16:59:39,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:39,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:39,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:39,327 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:39,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:59:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:40,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 3316 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 16:59:40,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-11-21 16:59:40,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:59:40,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:40,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248454275] [2022-11-21 16:59:40,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:59:40,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523535464] [2022-11-21 16:59:40,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523535464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:59:40,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:59:40,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:59:40,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882204145] [2022-11-21 16:59:40,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:59:40,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:59:40,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:59:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:59:40,172 INFO L87 Difference]: Start difference. First operand 527 states and 773 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-21 16:59:40,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:59:40,550 INFO L93 Difference]: Finished difference Result 1038 states and 1632 transitions. [2022-11-21 16:59:40,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:59:40,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 257 [2022-11-21 16:59:40,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:59:40,555 INFO L225 Difference]: With dead ends: 1038 [2022-11-21 16:59:40,556 INFO L226 Difference]: Without dead ends: 537 [2022-11-21 16:59:40,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:59:40,560 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 10 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:59:40,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1447 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:59:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-21 16:59:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 529. [2022-11-21 16:59:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 310 states have (on average 1.1935483870967742) internal successors, (370), 316 states have internal predecessors, (370), 171 states have call successors, (171), 42 states have call predecessors, (171), 47 states have return successors, (234), 170 states have call predecessors, (234), 169 states have call successors, (234) [2022-11-21 16:59:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 775 transitions. [2022-11-21 16:59:40,631 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 775 transitions. Word has length 257 [2022-11-21 16:59:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:59:40,632 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 775 transitions. [2022-11-21 16:59:40,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-21 16:59:40,632 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 775 transitions. [2022-11-21 16:59:40,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-11-21 16:59:40,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:59:40,635 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:59:40,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:59:40,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 16:59:40,852 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:59:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:59:40,854 INFO L85 PathProgramCache]: Analyzing trace with hash 313905941, now seen corresponding path program 1 times [2022-11-21 16:59:40,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:59:40,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906788706] [2022-11-21 16:59:40,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:40,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:59:40,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 16:59:40,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945895106] [2022-11-21 16:59:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:59:40,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:59:40,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:59:40,950 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:59:40,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:59:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:59:41,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 3326 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-21 16:59:41,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:59:43,942 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 25 treesize of output 17 [2022-11-21 16:59:43,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-21 16:59:43,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-21 16:59:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 286 proven. 6 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-11-21 16:59:44,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:59:44,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-21 16:59:44,984 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-21 16:59:45,104 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 [2022-11-21 16:59:45,339 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-21 16:59:45,340 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 23 treesize of output 18 [2022-11-21 16:59:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 30 proven. 80 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-11-21 16:59:45,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:59:45,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906788706] [2022-11-21 16:59:45,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 16:59:45,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945895106] [2022-11-21 16:59:45,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945895106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:59:45,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:59:45,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2022-11-21 16:59:45,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769588726] [2022-11-21 16:59:45,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 16:59:45,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-21 16:59:45,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:59:45,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-21 16:59:45,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2022-11-21 16:59:45,487 INFO L87 Difference]: Start difference. First operand 529 states and 775 transitions. Second operand has 36 states, 32 states have (on average 5.625) internal successors, (180), 30 states have internal predecessors, (180), 16 states have call successors, (64), 6 states have call predecessors, (64), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) [2022-11-21 16:59:47,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:59:49,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:59:52,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:59:54,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:59:56,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 16:59:58,115 WARN L539 Checker$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] [2022-11-21 17:00:00,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:02,224 WARN L539 Checker$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] [2022-11-21 17:00:04,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:06,357 WARN L539 Checker$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] [2022-11-21 17:00:08,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:10,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:12,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:14,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:16,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-21 17:00:18,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-21 17:00:20,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:22,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:24,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:27,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:29,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:31,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:34,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:36,588 WARN L539 Checker$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] [2022-11-21 17:00:38,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:40,759 WARN L539 Checker$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] [2022-11-21 17:00:42,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:44,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:46,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:48,915 WARN L539 Checker$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] [2022-11-21 17:00:50,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:52,964 WARN L539 Checker$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] [2022-11-21 17:00:55,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:57,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:00:59,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-21 17:01:01,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-21 17:01:04,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:06,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:08,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:11,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:13,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:15,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:17,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:19,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:21,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:23,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:25,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:27,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:30,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:32,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:34,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:36,302 WARN L539 Checker$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] [2022-11-21 17:01:40,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:42,199 WARN L539 Checker$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] [2022-11-21 17:01:44,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:46,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:49,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:51,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:01:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:01:57,246 INFO L93 Difference]: Finished difference Result 1411 states and 2178 transitions. [2022-11-21 17:01:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-21 17:01:57,247 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 5.625) internal successors, (180), 30 states have internal predecessors, (180), 16 states have call successors, (64), 6 states have call predecessors, (64), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) Word has length 257 [2022-11-21 17:01:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:01:57,255 INFO L225 Difference]: With dead ends: 1411 [2022-11-21 17:01:57,255 INFO L226 Difference]: Without dead ends: 915 [2022-11-21 17:01:57,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 477 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=353, Invalid=2617, Unknown=0, NotChecked=0, Total=2970 [2022-11-21 17:01:57,260 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 789 mSDsluCounter, 5114 mSDsCounter, 0 mSdLazyCounter, 6835 mSolverCounterSat, 414 mSolverCounterUnsat, 58 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 5610 SdHoareTripleChecker+Invalid, 7307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 6835 IncrementalHoareTripleChecker+Invalid, 58 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 130.1s IncrementalHoareTripleChecker+Time [2022-11-21 17:01:57,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 5610 Invalid, 7307 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [414 Valid, 6835 Invalid, 58 Unknown, 0 Unchecked, 130.1s Time] [2022-11-21 17:01:57,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-11-21 17:01:57,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 809. [2022-11-21 17:01:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 476 states have (on average 1.184873949579832) internal successors, (564), 485 states have internal predecessors, (564), 257 states have call successors, (257), 67 states have call predecessors, (257), 75 states have return successors, (447), 256 states have call predecessors, (447), 253 states have call successors, (447) [2022-11-21 17:01:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1268 transitions. [2022-11-21 17:01:57,358 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1268 transitions. Word has length 257 [2022-11-21 17:01:57,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:01:57,358 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 1268 transitions. [2022-11-21 17:01:57,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 5.625) internal successors, (180), 30 states have internal predecessors, (180), 16 states have call successors, (64), 6 states have call predecessors, (64), 12 states have return successors, (61), 15 states have call predecessors, (61), 15 states have call successors, (61) [2022-11-21 17:01:57,359 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1268 transitions. [2022-11-21 17:01:57,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-11-21 17:01:57,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:01:57,362 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:01:57,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 17:01:57,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 17:01:57,575 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:01:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:01:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash 145973653, now seen corresponding path program 1 times [2022-11-21 17:01:57,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:01:57,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926508593] [2022-11-21 17:01:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:01:57,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:01:57,681 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:01:57,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021733142] [2022-11-21 17:01:57,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:01:57,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:01:57,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:01:57,683 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:01:57,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 17:01:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:01:58,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 3326 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-21 17:01:58,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:01:58,489 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 [2022-11-21 17:01:58,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:01:58,873 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 21 treesize of output 20 [2022-11-21 17:01:58,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:01:58,880 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 21 treesize of output 20 [2022-11-21 17:01:59,027 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2109 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2109) |c_#memory_$Pointer$.base|)) (exists ((v_ArrVal_2108 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2108) |c_#memory_$Pointer$.offset|))) is different from true [2022-11-21 17:01:59,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:01:59,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 17:01:59,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:01:59,439 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 16 treesize of output 18 [2022-11-21 17:01:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 177 proven. 4 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-11-21 17:01:59,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:01:59,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:01:59,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926508593] [2022-11-21 17:01:59,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:01:59,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021733142] [2022-11-21 17:01:59,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021733142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:01:59,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:01:59,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-21 17:01:59,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741669285] [2022-11-21 17:01:59,956 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:01:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 17:01:59,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:01:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 17:01:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=4, NotChecked=28, Total=272 [2022-11-21 17:01:59,957 INFO L87 Difference]: Start difference. First operand 809 states and 1268 transitions. Second operand has 16 states, 15 states have (on average 6.333333333333333) internal successors, (95), 14 states have internal predecessors, (95), 5 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2022-11-21 17:02:09,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:02:09,216 INFO L93 Difference]: Finished difference Result 1810 states and 3014 transitions. [2022-11-21 17:02:09,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 17:02:09,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.333333333333333) internal successors, (95), 14 states have internal predecessors, (95), 5 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) Word has length 257 [2022-11-21 17:02:09,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:02:09,226 INFO L225 Difference]: With dead ends: 1810 [2022-11-21 17:02:09,226 INFO L226 Difference]: Without dead ends: 1024 [2022-11-21 17:02:09,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 446 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=627, Unknown=8, NotChecked=52, Total=812 [2022-11-21 17:02:09,232 INFO L413 NwaCegarLoop]: 287 mSDtfsCounter, 374 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 3974 mSolverCounterSat, 356 mSolverCounterUnsat, 39 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 4957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 3974 IncrementalHoareTripleChecker+Invalid, 39 IncrementalHoareTripleChecker+Unknown, 588 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-21 17:02:09,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 1428 Invalid, 4957 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [356 Valid, 3974 Invalid, 39 Unknown, 588 Unchecked, 8.5s Time] [2022-11-21 17:02:09,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-11-21 17:02:09,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 956. [2022-11-21 17:02:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 564 states have (on average 1.1843971631205674) internal successors, (668), 577 states have internal predecessors, (668), 302 states have call successors, (302), 74 states have call predecessors, (302), 89 states have return successors, (698), 304 states have call predecessors, (698), 298 states have call successors, (698) [2022-11-21 17:02:09,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1668 transitions. [2022-11-21 17:02:09,408 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1668 transitions. Word has length 257 [2022-11-21 17:02:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:02:09,409 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 1668 transitions. [2022-11-21 17:02:09,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.333333333333333) internal successors, (95), 14 states have internal predecessors, (95), 5 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2022-11-21 17:02:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1668 transitions. [2022-11-21 17:02:09,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-11-21 17:02:09,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:02:09,413 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:02:09,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 17:02:09,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 17:02:09,627 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:02:09,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:02:09,628 INFO L85 PathProgramCache]: Analyzing trace with hash 225605926, now seen corresponding path program 1 times [2022-11-21 17:02:09,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:02:09,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736757752] [2022-11-21 17:02:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:02:09,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:02:09,703 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:02:09,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068643642] [2022-11-21 17:02:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:02:09,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:02:09,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:02:09,705 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:02:09,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 17:02:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:10,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 3385 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-21 17:02:10,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:02:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 350 proven. 2 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-11-21 17:02:10,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:02:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 48 proven. 81 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2022-11-21 17:02:12,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:02:12,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736757752] [2022-11-21 17:02:12,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:02:12,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068643642] [2022-11-21 17:02:12,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068643642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:02:12,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:02:12,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 31 [2022-11-21 17:02:12,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619414560] [2022-11-21 17:02:12,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:02:12,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-21 17:02:12,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:02:12,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-21 17:02:12,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2022-11-21 17:02:12,013 INFO L87 Difference]: Start difference. First operand 956 states and 1668 transitions. Second operand has 31 states, 27 states have (on average 5.37037037037037) internal successors, (145), 22 states have internal predecessors, (145), 7 states have call successors, (50), 3 states have call predecessors, (50), 10 states have return successors, (52), 10 states have call predecessors, (52), 6 states have call successors, (52) [2022-11-21 17:02:13,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:02:13,343 INFO L93 Difference]: Finished difference Result 1815 states and 3205 transitions. [2022-11-21 17:02:13,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 17:02:13,344 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 5.37037037037037) internal successors, (145), 22 states have internal predecessors, (145), 7 states have call successors, (50), 3 states have call predecessors, (50), 10 states have return successors, (52), 10 states have call predecessors, (52), 6 states have call successors, (52) Word has length 293 [2022-11-21 17:02:13,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:02:13,356 INFO L225 Difference]: With dead ends: 1815 [2022-11-21 17:02:13,356 INFO L226 Difference]: Without dead ends: 965 [2022-11-21 17:02:13,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 551 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-11-21 17:02:13,364 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 40 mSDsluCounter, 9425 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 9800 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:02:13,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 9800 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-21 17:02:13,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-11-21 17:02:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 956. [2022-11-21 17:02:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 564 states have (on average 1.1843971631205674) internal successors, (668), 577 states have internal predecessors, (668), 302 states have call successors, (302), 74 states have call predecessors, (302), 89 states have return successors, (695), 304 states have call predecessors, (695), 298 states have call successors, (695) [2022-11-21 17:02:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1665 transitions. [2022-11-21 17:02:13,486 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1665 transitions. Word has length 293 [2022-11-21 17:02:13,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:02:13,487 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 1665 transitions. [2022-11-21 17:02:13,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 5.37037037037037) internal successors, (145), 22 states have internal predecessors, (145), 7 states have call successors, (50), 3 states have call predecessors, (50), 10 states have return successors, (52), 10 states have call predecessors, (52), 6 states have call successors, (52) [2022-11-21 17:02:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1665 transitions. [2022-11-21 17:02:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-11-21 17:02:13,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:02:13,491 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:02:13,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 17:02:13,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:02:13,703 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:02:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:02:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash 871201516, now seen corresponding path program 2 times [2022-11-21 17:02:13,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:02:13,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391646249] [2022-11-21 17:02:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:02:13,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:02:13,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:02:13,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760771695] [2022-11-21 17:02:13,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:02:13,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:02:13,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:02:13,786 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:02:13,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 17:02:14,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:02:14,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:02:14,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 3372 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-21 17:02:14,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:02:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 211 proven. 9 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-11-21 17:02:15,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:02:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 76 proven. 15 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-11-21 17:02:16,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:02:16,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391646249] [2022-11-21 17:02:16,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:02:16,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760771695] [2022-11-21 17:02:16,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760771695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:02:16,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:02:16,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 27 [2022-11-21 17:02:16,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486266742] [2022-11-21 17:02:16,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-21 17:02:16,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 17:02:16,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:02:16,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 17:02:16,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2022-11-21 17:02:16,235 INFO L87 Difference]: Start difference. First operand 956 states and 1665 transitions. Second operand has 27 states, 23 states have (on average 5.782608695652174) internal successors, (133), 18 states have internal predecessors, (133), 7 states have call successors, (44), 3 states have call predecessors, (44), 9 states have return successors, (47), 11 states have call predecessors, (47), 6 states have call successors, (47) [2022-11-21 17:02:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:02:17,208 INFO L93 Difference]: Finished difference Result 1323 states and 2208 transitions. [2022-11-21 17:02:17,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 17:02:17,211 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 5.782608695652174) internal successors, (133), 18 states have internal predecessors, (133), 7 states have call successors, (44), 3 states have call predecessors, (44), 9 states have return successors, (47), 11 states have call predecessors, (47), 6 states have call successors, (47) Word has length 279 [2022-11-21 17:02:17,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:02:17,216 INFO L225 Difference]: With dead ends: 1323 [2022-11-21 17:02:17,216 INFO L226 Difference]: Without dead ends: 525 [2022-11-21 17:02:17,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 527 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2022-11-21 17:02:17,221 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 45 mSDsluCounter, 7544 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 7914 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 17:02:17,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 7914 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 17:02:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-21 17:02:17,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 493. [2022-11-21 17:02:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 309 states have (on average 1.145631067961165) internal successors, (354), 316 states have internal predecessors, (354), 130 states have call successors, (130), 46 states have call predecessors, (130), 53 states have return successors, (269), 130 states have call predecessors, (269), 128 states have call successors, (269) [2022-11-21 17:02:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 753 transitions. [2022-11-21 17:02:17,274 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 753 transitions. Word has length 279 [2022-11-21 17:02:17,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:02:17,275 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 753 transitions. [2022-11-21 17:02:17,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 5.782608695652174) internal successors, (133), 18 states have internal predecessors, (133), 7 states have call successors, (44), 3 states have call predecessors, (44), 9 states have return successors, (47), 11 states have call predecessors, (47), 6 states have call successors, (47) [2022-11-21 17:02:17,276 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 753 transitions. [2022-11-21 17:02:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-11-21 17:02:17,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:02:17,279 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:02:17,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 17:02:17,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 17:02:17,492 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:02:17,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:02:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1566201926, now seen corresponding path program 3 times [2022-11-21 17:02:17,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:02:17,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99267200] [2022-11-21 17:02:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:02:17,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:02:17,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:02:17,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584724359] [2022-11-21 17:02:17,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:02:17,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:02:17,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:02:17,632 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:02:17,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 17:02:19,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 17:02:19,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:02:19,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 2477 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-21 17:02:19,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:02:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 279 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-11-21 17:02:19,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:02:19,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:02:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99267200] [2022-11-21 17:02:19,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:02:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584724359] [2022-11-21 17:02:19,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584724359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:02:19,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:02:19,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-21 17:02:19,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552038554] [2022-11-21 17:02:19,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:02:19,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:02:19,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:02:19,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:02:19,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:02:19,825 INFO L87 Difference]: Start difference. First operand 493 states and 753 transitions. Second operand has 12 states, 11 states have (on average 10.0) internal successors, (110), 9 states have internal predecessors, (110), 3 states have call successors, (35), 2 states have call predecessors, (35), 6 states have return successors, (35), 5 states have call predecessors, (35), 3 states have call successors, (35) [2022-11-21 17:02:20,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:02:20,285 INFO L93 Difference]: Finished difference Result 824 states and 1259 transitions. [2022-11-21 17:02:20,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 17:02:20,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 10.0) internal successors, (110), 9 states have internal predecessors, (110), 3 states have call successors, (35), 2 states have call predecessors, (35), 6 states have return successors, (35), 5 states have call predecessors, (35), 3 states have call successors, (35) Word has length 281 [2022-11-21 17:02:20,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:02:20,290 INFO L225 Difference]: With dead ends: 824 [2022-11-21 17:02:20,290 INFO L226 Difference]: Without dead ends: 487 [2022-11-21 17:02:20,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-21 17:02:20,293 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 11 mSDsluCounter, 3604 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3976 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 17:02:20,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3976 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 17:02:20,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-21 17:02:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 487. [2022-11-21 17:02:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 307 states have (on average 1.1465798045602607) internal successors, (352), 314 states have internal predecessors, (352), 126 states have call successors, (126), 46 states have call predecessors, (126), 53 states have return successors, (254), 126 states have call predecessors, (254), 124 states have call successors, (254) [2022-11-21 17:02:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 732 transitions. [2022-11-21 17:02:20,342 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 732 transitions. Word has length 281 [2022-11-21 17:02:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:02:20,342 INFO L495 AbstractCegarLoop]: Abstraction has 487 states and 732 transitions. [2022-11-21 17:02:20,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 10.0) internal successors, (110), 9 states have internal predecessors, (110), 3 states have call successors, (35), 2 states have call predecessors, (35), 6 states have return successors, (35), 5 states have call predecessors, (35), 3 states have call successors, (35) [2022-11-21 17:02:20,343 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 732 transitions. [2022-11-21 17:02:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-11-21 17:02:20,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:02:20,346 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:02:20,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-21 17:02:20,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 17:02:20,559 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:02:20,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:02:20,560 INFO L85 PathProgramCache]: Analyzing trace with hash 165463492, now seen corresponding path program 1 times [2022-11-21 17:02:20,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:02:20,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129128721] [2022-11-21 17:02:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:02:20,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:02:20,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:02:20,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730214769] [2022-11-21 17:02:20,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:02:20,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:02:20,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:02:20,659 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:02:20,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 17:02:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:02:21,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 3365 conjuncts, 156 conjunts are in the unsatisfiable core [2022-11-21 17:02:21,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:02:21,697 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 [2022-11-21 17:02:21,896 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 [2022-11-21 17:02:21,926 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 [2022-11-21 17:02:22,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-21 17:02:22,078 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 17:02:22,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-21 17:02:22,271 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2840 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_2840) |c_#memory_$Pointer$.offset|)) is different from true [2022-11-21 17:02:22,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:02:22,792 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 31 treesize of output 19 [2022-11-21 17:02:22,805 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 17:02:22,806 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 [2022-11-21 17:02:23,912 WARN L859 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_2841 (Array Int Int)) (v_ArrVal_2842 Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_2842))) (= (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_2841) |c_#memory_int|))) is different from true [2022-11-21 17:02:24,171 WARN L859 $PredicateComparison]: unable to prove that (and (not (= 0 (mod (select (select |c_#memory_int| |c_aws_array_list_is_valid_#in~list.base|) (+ |c_aws_array_list_is_valid_#in~list.offset| 8)) 18446744073709551616))) (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_2841 (Array Int Int)) (v_ArrVal_2842 Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) 0 v_ArrVal_2842))) (= (store |c_old(#memory_int)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| v_ArrVal_2841) |c_#memory_int|)))) is different from true [2022-11-21 17:02:24,254 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 43 treesize of output 31 [2022-11-21 17:02:24,259 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 [2022-11-21 17:02:24,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:02:24,266 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 22 treesize of output 21 [2022-11-21 17:03:09,012 WARN L859 $PredicateComparison]: unable to prove that (exists ((|aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| Int) (v_ArrVal_2845 Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_mul_size_checked_aws_mul_u64_checked_~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_2845)))) is different from true [2022-11-21 17:03:17,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:03:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 323 proven. 95 refuted. 2 times theorem prover too weak. 118 trivial. 21 not checked. [2022-11-21 17:03:17,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:03:19,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:03:19,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129128721] [2022-11-21 17:03:19,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:03:19,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730214769] [2022-11-21 17:03:19,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730214769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:03:19,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:03:19,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2022-11-21 17:03:19,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310250190] [2022-11-21 17:03:19,902 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:03:19,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-21 17:03:19,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:03:19,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-21 17:03:19,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1574, Unknown=104, NotChecked=340, Total=2162 [2022-11-21 17:03:19,906 INFO L87 Difference]: Start difference. First operand 487 states and 732 transitions. Second operand has 46 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 38 states have internal predecessors, (128), 16 states have call successors, (38), 12 states have call predecessors, (38), 14 states have return successors, (36), 15 states have call predecessors, (36), 16 states have call successors, (36) [2022-11-21 17:03:34,578 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] [2022-11-21 17:03:40,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:03:46,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:03:49,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:03:51,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:03:53,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:03:55,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:03:57,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:03:59,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:01,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:03,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:05,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:07,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:09,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:11,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-21 17:04:16,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:18,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:20,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:24,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:28,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:32,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:36,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:41,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:45,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:47,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:53,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:57,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:04:59,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:05:04,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:05:08,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:05:12,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:05:14,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:05:16,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:05:20,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:05:25,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:05:29,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:05:33,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:05:37,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:05:39,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:05:46,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:05:52,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:06:01,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:06:05,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:06:07,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:06:09,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:06:12,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:06:14,258 WARN L539 Checker$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] [2022-11-21 17:06:16,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-21 17:06:25,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:06:27,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:06:29,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:06:32,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:06:34,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:06:36,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:06:40,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-11-21 17:07:10,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:12,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:14,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:17,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:19,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:21,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:24,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:26,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:29,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:31,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:34,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:36,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:38,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:40,445 WARN L539 Checker$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] [2022-11-21 17:07:43,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:57,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:07:59,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:01,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:03,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:05,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:07,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:09,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:12,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:14,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:16,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:19,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:21,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:23,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:25,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:27,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:29,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:31,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:33,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:35,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:38,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:40,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:42,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:45,529 WARN L539 Checker$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] [2022-11-21 17:08:48,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:52,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:54,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:57,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:08:59,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:01,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:04,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:06,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:08,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:10,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:12,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:14,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:16,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:22,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:34,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:36,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:38,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:40,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:43,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:45,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:49,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:52,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:55,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:09:57,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:10:03,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:10:05,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:10:07,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:10:09,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:10:12,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:10:14,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:10:16,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:10:18,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:10:20,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:10:22,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:10:25,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:10:27,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:10:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:10:33,151 INFO L93 Difference]: Finished difference Result 1499 states and 2315 transitions. [2022-11-21 17:10:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-11-21 17:10:33,152 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 38 states have internal predecessors, (128), 16 states have call successors, (38), 12 states have call predecessors, (38), 14 states have return successors, (36), 15 states have call predecessors, (36), 16 states have call successors, (36) Word has length 263 [2022-11-21 17:10:33,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:10:33,158 INFO L225 Difference]: With dead ends: 1499 [2022-11-21 17:10:33,158 INFO L226 Difference]: Without dead ends: 1119 [2022-11-21 17:10:33,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 320 SyntacticMatches, 14 SemanticMatches, 131 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 5182 ImplicationChecksByTransitivity, 183.8s TimeCoverageRelationStatistics Valid=1481, Invalid=14681, Unknown=366, NotChecked=1028, Total=17556 [2022-11-21 17:10:33,165 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 1308 mSDsluCounter, 5210 mSDsCounter, 0 mSdLazyCounter, 24284 mSolverCounterSat, 1550 mSolverCounterUnsat, 652 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 302.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1330 SdHoareTripleChecker+Valid, 5642 SdHoareTripleChecker+Invalid, 31051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1550 IncrementalHoareTripleChecker+Valid, 24284 IncrementalHoareTripleChecker+Invalid, 652 IncrementalHoareTripleChecker+Unknown, 4565 IncrementalHoareTripleChecker+Unchecked, 305.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:10:33,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1330 Valid, 5642 Invalid, 31051 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1550 Valid, 24284 Invalid, 652 Unknown, 4565 Unchecked, 305.3s Time] [2022-11-21 17:10:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-11-21 17:10:33,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1022. [2022-11-21 17:10:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 631 states have (on average 1.1568938193343898) internal successors, (730), 644 states have internal predecessors, (730), 279 states have call successors, (279), 95 states have call predecessors, (279), 111 states have return successors, (564), 282 states have call predecessors, (564), 275 states have call successors, (564) [2022-11-21 17:10:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1573 transitions. [2022-11-21 17:10:33,284 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1573 transitions. Word has length 263 [2022-11-21 17:10:33,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:10:33,284 INFO L495 AbstractCegarLoop]: Abstraction has 1022 states and 1573 transitions. [2022-11-21 17:10:33,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 38 states have internal predecessors, (128), 16 states have call successors, (38), 12 states have call predecessors, (38), 14 states have return successors, (36), 15 states have call predecessors, (36), 16 states have call successors, (36) [2022-11-21 17:10:33,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1573 transitions. [2022-11-21 17:10:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-11-21 17:10:33,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:10:33,289 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:10:33,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:33,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 17:10:33,502 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:10:33,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:33,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1556591866, now seen corresponding path program 4 times [2022-11-21 17:10:33,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:33,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811618910] [2022-11-21 17:10:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:33,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:33,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:10:33,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908385586] [2022-11-21 17:10:33,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 17:10:33,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:33,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:33,651 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:33,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 17:10:34,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 17:10:34,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:10:34,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 3377 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-21 17:10:34,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-11-21 17:10:34,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:10:34,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:34,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811618910] [2022-11-21 17:10:34,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:10:34,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908385586] [2022-11-21 17:10:34,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908385586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:10:34,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:10:34,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-21 17:10:34,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017230155] [2022-11-21 17:10:34,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:34,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:10:34,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:34,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:10:34,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:10:34,752 INFO L87 Difference]: Start difference. First operand 1022 states and 1573 transitions. Second operand has 12 states, 11 states have (on average 9.545454545454545) internal successors, (105), 9 states have internal predecessors, (105), 3 states have call successors, (36), 2 states have call predecessors, (36), 6 states have return successors, (34), 5 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-21 17:10:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:10:35,216 INFO L93 Difference]: Finished difference Result 1503 states and 2299 transitions. [2022-11-21 17:10:35,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 17:10:35,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 9.545454545454545) internal successors, (105), 9 states have internal predecessors, (105), 3 states have call successors, (36), 2 states have call predecessors, (36), 6 states have return successors, (34), 5 states have call predecessors, (34), 3 states have call successors, (34) Word has length 281 [2022-11-21 17:10:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:10:35,223 INFO L225 Difference]: With dead ends: 1503 [2022-11-21 17:10:35,224 INFO L226 Difference]: Without dead ends: 1000 [2022-11-21 17:10:35,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-21 17:10:35,227 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 9 mSDsluCounter, 3626 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4000 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 17:10:35,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4000 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 17:10:35,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2022-11-21 17:10:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 1000. [2022-11-21 17:10:35,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 616 states have (on average 1.155844155844156) internal successors, (712), 630 states have internal predecessors, (712), 274 states have call successors, (274), 94 states have call predecessors, (274), 109 states have return successors, (554), 275 states have call predecessors, (554), 270 states have call successors, (554) [2022-11-21 17:10:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1540 transitions. [2022-11-21 17:10:35,346 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1540 transitions. Word has length 281 [2022-11-21 17:10:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:10:35,347 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1540 transitions. [2022-11-21 17:10:35,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 9.545454545454545) internal successors, (105), 9 states have internal predecessors, (105), 3 states have call successors, (36), 2 states have call predecessors, (36), 6 states have return successors, (34), 5 states have call predecessors, (34), 3 states have call successors, (34) [2022-11-21 17:10:35,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1540 transitions. [2022-11-21 17:10:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-21 17:10:35,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:10:35,351 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:10:35,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:35,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 17:10:35,563 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:10:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:35,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2013443463, now seen corresponding path program 1 times [2022-11-21 17:10:35,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:35,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520056741] [2022-11-21 17:10:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:35,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:35,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:10:35,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843282148] [2022-11-21 17:10:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:35,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:35,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:35,666 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:35,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-21 17:10:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:36,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 3371 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-21 17:10:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:36,607 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 [2022-11-21 17:10:36,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:10:36,923 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 21 treesize of output 20 [2022-11-21 17:10:36,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:10:36,936 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 21 treesize of output 20 [2022-11-21 17:10:37,042 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3267 (Array Int Int))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_3267))) (exists ((v_ArrVal_3266 (Array Int Int))) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_3266) |c_#memory_$Pointer$.base|))) is different from true [2022-11-21 17:10:37,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:10:37,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 17:10:37,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:10:37,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-21 17:10:37,179 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 17:10:37,180 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 [2022-11-21 17:10:37,707 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 [2022-11-21 17:10:37,715 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 [2022-11-21 17:10:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 281 proven. 20 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-11-21 17:10:37,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:10:38,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:38,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520056741] [2022-11-21 17:10:38,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:10:38,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843282148] [2022-11-21 17:10:38,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843282148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:38,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:10:38,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-21 17:10:38,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849958605] [2022-11-21 17:10:38,142 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:10:38,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 17:10:38,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:38,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 17:10:38,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=196, Unknown=2, NotChecked=28, Total=272 [2022-11-21 17:10:38,143 INFO L87 Difference]: Start difference. First operand 1000 states and 1540 transitions. Second operand has 15 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 7 states have call successors, (34), 6 states have call predecessors, (34), 7 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2022-11-21 17:10:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:10:43,245 INFO L93 Difference]: Finished difference Result 1601 states and 2420 transitions. [2022-11-21 17:10:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 17:10:43,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 7 states have call successors, (34), 6 states have call predecessors, (34), 7 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) Word has length 264 [2022-11-21 17:10:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:10:43,250 INFO L225 Difference]: With dead ends: 1601 [2022-11-21 17:10:43,251 INFO L226 Difference]: Without dead ends: 1097 [2022-11-21 17:10:43,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 454 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=482, Unknown=3, NotChecked=46, Total=650 [2022-11-21 17:10:43,253 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 309 mSDsluCounter, 1465 mSDsCounter, 0 mSdLazyCounter, 2461 mSolverCounterSat, 307 mSolverCounterUnsat, 81 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 3344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 2461 IncrementalHoareTripleChecker+Invalid, 81 IncrementalHoareTripleChecker+Unknown, 495 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-21 17:10:43,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 1751 Invalid, 3344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 2461 Invalid, 81 Unknown, 495 Unchecked, 4.7s Time] [2022-11-21 17:10:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-11-21 17:10:43,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1048. [2022-11-21 17:10:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 649 states have (on average 1.1571648690292757) internal successors, (751), 664 states have internal predecessors, (751), 285 states have call successors, (285), 98 states have call predecessors, (285), 113 states have return successors, (524), 285 states have call predecessors, (524), 281 states have call successors, (524) [2022-11-21 17:10:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1560 transitions. [2022-11-21 17:10:43,373 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1560 transitions. Word has length 264 [2022-11-21 17:10:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:10:43,373 INFO L495 AbstractCegarLoop]: Abstraction has 1048 states and 1560 transitions. [2022-11-21 17:10:43,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 7.142857142857143) internal successors, (100), 14 states have internal predecessors, (100), 7 states have call successors, (34), 6 states have call predecessors, (34), 7 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2022-11-21 17:10:43,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1560 transitions. [2022-11-21 17:10:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-21 17:10:43,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:10:43,377 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:10:43,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:43,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:43,591 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:10:43,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:43,591 INFO L85 PathProgramCache]: Analyzing trace with hash -628238344, now seen corresponding path program 1 times [2022-11-21 17:10:43,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:43,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041937942] [2022-11-21 17:10:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:43,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:43,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:10:43,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529617332] [2022-11-21 17:10:43,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:43,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:43,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:43,692 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:43,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-21 17:10:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:44,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 3410 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-21 17:10:44,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:44,659 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 [2022-11-21 17:10:44,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-21 17:10:45,009 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 [2022-11-21 17:10:45,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-21 17:10:45,175 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-21 17:10:45,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-21 17:10:45,394 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3540 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_3540))) is different from true [2022-11-21 17:10:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 193 proven. 4 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2022-11-21 17:10:45,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:10:46,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:46,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041937942] [2022-11-21 17:10:46,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:10:46,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529617332] [2022-11-21 17:10:46,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529617332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:46,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:10:46,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-11-21 17:10:46,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101014952] [2022-11-21 17:10:46,041 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:10:46,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 17:10:46,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:46,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 17:10:46,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=425, Unknown=7, NotChecked=42, Total=552 [2022-11-21 17:10:46,043 INFO L87 Difference]: Start difference. First operand 1048 states and 1560 transitions. Second operand has 23 states, 21 states have (on average 4.857142857142857) internal successors, (102), 19 states have internal predecessors, (102), 8 states have call successors, (35), 9 states have call predecessors, (35), 9 states have return successors, (33), 7 states have call predecessors, (33), 8 states have call successors, (33) [2022-11-21 17:11:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 17:11:01,244 INFO L93 Difference]: Finished difference Result 2112 states and 3191 transitions. [2022-11-21 17:11:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-21 17:11:01,245 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 4.857142857142857) internal successors, (102), 19 states have internal predecessors, (102), 8 states have call successors, (35), 9 states have call predecessors, (35), 9 states have return successors, (33), 7 states have call predecessors, (33), 8 states have call successors, (33) Word has length 270 [2022-11-21 17:11:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 17:11:01,257 INFO L225 Difference]: With dead ends: 2112 [2022-11-21 17:11:01,257 INFO L226 Difference]: Without dead ends: 1594 [2022-11-21 17:11:01,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 459 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=294, Invalid=1760, Unknown=20, NotChecked=88, Total=2162 [2022-11-21 17:11:01,262 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 663 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 7228 mSolverCounterSat, 549 mSolverCounterUnsat, 284 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 8848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 549 IncrementalHoareTripleChecker+Valid, 7228 IncrementalHoareTripleChecker+Invalid, 284 IncrementalHoareTripleChecker+Unknown, 787 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-11-21 17:11:01,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 2252 Invalid, 8848 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [549 Valid, 7228 Invalid, 284 Unknown, 787 Unchecked, 14.0s Time] [2022-11-21 17:11:01,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2022-11-21 17:11:01,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1567. [2022-11-21 17:11:01,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1567 states, 952 states have (on average 1.1649159663865547) internal successors, (1109), 968 states have internal predecessors, (1109), 442 states have call successors, (442), 145 states have call predecessors, (442), 172 states have return successors, (854), 453 states have call predecessors, (854), 438 states have call successors, (854) [2022-11-21 17:11:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 2405 transitions. [2022-11-21 17:11:01,488 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 2405 transitions. Word has length 270 [2022-11-21 17:11:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 17:11:01,488 INFO L495 AbstractCegarLoop]: Abstraction has 1567 states and 2405 transitions. [2022-11-21 17:11:01,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 4.857142857142857) internal successors, (102), 19 states have internal predecessors, (102), 8 states have call successors, (35), 9 states have call predecessors, (35), 9 states have return successors, (33), 7 states have call predecessors, (33), 8 states have call successors, (33) [2022-11-21 17:11:01,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 2405 transitions. [2022-11-21 17:11:01,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-21 17:11:01,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 17:11:01,493 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:11:01,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-21 17:11:01,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:11:01,705 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:11:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:11:01,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1762062410, now seen corresponding path program 1 times [2022-11-21 17:11:01,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:11:01,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869255457] [2022-11-21 17:11:01,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:11:01,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:11:01,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-21 17:11:01,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004648665] [2022-11-21 17:11:01,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:11:01,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:11:01,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:11:01,790 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:11:01,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59a00213-06ad-42da-a88e-51e515964e99/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-21 17:11:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:11:02,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 3407 conjuncts, 201 conjunts are in the unsatisfiable core [2022-11-21 17:11:02,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:11:02,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-21 17:11:03,127 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 [2022-11-21 17:11:03,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 15 [2022-11-21 17:11:07,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2022-11-21 17:11:07,381 INFO L321 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2022-11-21 17:11:07,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2022-11-21 17:11:07,560 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3807 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_3807))) is different from true [2022-11-21 17:11:09,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 17:11:09,685 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 27 treesize of output 27 [2022-11-21 17:11:09,693 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 17:11:09,693 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 [2022-11-21 17:12:04,159 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 17:12:04,160 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 27 treesize of output 31 [2022-11-21 17:12:04,164 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 17 treesize of output 9 [2022-11-21 17:12:04,261 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-21 17:12:04,262 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 32 treesize of output 36 [2022-11-21 17:12:04,271 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 17 treesize of output 9 [2022-11-21 17:12:04,448 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3811 Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_3811)))) is different from true [2022-11-21 17:12:12,745 WARN L859 $PredicateComparison]: unable to prove that (and (not (= 0 (mod (select (select |c_#memory_int| |c_aws_array_list_is_valid_#in~list.base|) (+ |c_aws_array_list_is_valid_#in~list.offset| 8)) 18446744073709551616))) (exists ((|aws_array_list_is_valid_~#required_size~0.base| Int) (v_ArrVal_3811 Int)) (= (store |c_old(#memory_$Pointer$.base)| |aws_array_list_is_valid_~#required_size~0.base| (store (select |c_old(#memory_$Pointer$.base)| |aws_array_list_is_valid_~#required_size~0.base|) 0 v_ArrVal_3811)) |c_#memory_$Pointer$.base|))) is different from true [2022-11-21 17:12:12,778 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 [2022-11-21 17:12:37,998 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_3813 Int)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_mul_size_checked_#in~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_3813)))) (exists ((v_ArrVal_3812 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base|) |c_aws_mul_size_checked_#in~r#1.offset| v_ArrVal_3812))))) is different from true [2022-11-21 17:13:08,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:13:08,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-21 17:13:08,974 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 22 treesize of output 21 [2022-11-21 17:13:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 363 proven. 105 refuted. 0 times theorem prover too weak. 123 trivial. 16 not checked. [2022-11-21 17:13:08,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:13:15,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:13:15,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869255457] [2022-11-21 17:13:15,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-21 17:13:15,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004648665] [2022-11-21 17:13:15,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004648665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:13:15,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:13:15,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2022-11-21 17:13:15,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212828217] [2022-11-21 17:13:15,470 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-21 17:13:15,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-21 17:13:15,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:13:15,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-21 17:13:15,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1368, Unknown=67, NotChecked=316, Total=1892 [2022-11-21 17:13:15,472 INFO L87 Difference]: Start difference. First operand 1567 states and 2405 transitions. Second operand has 43 states, 38 states have (on average 3.4210526315789473) internal successors, (130), 37 states have internal predecessors, (130), 18 states have call successors, (39), 11 states have call predecessors, (39), 14 states have return successors, (37), 16 states have call predecessors, (37), 18 states have call successors, (37) [2022-11-21 17:13:18,859 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] [2022-11-21 17:13:23,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:13:29,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:13:31,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:13:37,512 WARN L539 Checker$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] [2022-11-21 17:13:39,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:13:47,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:13:49,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:13:51,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:13:53,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:13:55,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 17:13:58,016 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]