./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:15:50,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:15:50,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:15:50,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:15:50,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:15:50,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:15:50,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:15:50,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:15:50,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:15:50,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:15:50,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:15:50,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:15:50,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:15:50,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:15:50,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:15:50,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:15:50,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:15:50,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:15:50,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:15:50,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:15:50,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:15:50,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:15:50,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:15:50,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:15:50,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:15:50,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:15:50,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:15:50,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:15:50,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:15:50,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:15:50,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:15:50,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:15:50,315 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:15:50,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:15:50,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:15:50,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:15:50,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:15:50,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:15:50,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:15:50,319 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:15:50,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:15:50,321 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 15:15:50,344 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:15:50,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:15:50,345 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:15:50,345 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:15:50,346 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:15:50,346 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:15:50,347 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:15:50,347 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:15:50,347 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:15:50,347 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:15:50,348 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:15:50,348 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:15:50,348 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:15:50,349 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:15:50,349 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:15:50,349 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:15:50,349 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:15:50,350 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:15:50,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:15:50,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:15:50,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:15:50,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:15:50,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:15:50,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:15:50,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:15:50,352 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:15:50,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:15:50,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:15:50,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:15:50,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:15:50,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:15:50,354 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:15:50,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:15:50,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:15:50,355 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:15:50,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:15:50,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:15:50,356 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:15:50,356 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_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d [2022-11-23 15:15:50,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:15:50,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:15:50,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:15:50,669 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:15:50,670 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:15:50,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2022-11-23 15:15:54,136 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:15:54,892 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:15:54,893 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2022-11-23 15:15:54,931 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/data/595a71143/05ef40553e9143f8b86b8ca5acb63cbe/FLAG938f5630c [2022-11-23 15:15:54,948 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/data/595a71143/05ef40553e9143f8b86b8ca5acb63cbe [2022-11-23 15:15:54,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:15:54,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:15:54,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:15:54,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:15:54,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:15:54,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:15:54" (1/1) ... [2022-11-23 15:15:54,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7eb8f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:54, skipping insertion in model container [2022-11-23 15:15:54,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:15:54" (1/1) ... [2022-11-23 15:15:54,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:15:55,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:15:55,363 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_5b21d819-7241-48c2-b6c2-f027d767b7e4/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2022-11-23 15:15:55,372 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_5b21d819-7241-48c2-b6c2-f027d767b7e4/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2022-11-23 15:15:56,591 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:56,592 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:56,592 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:56,593 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:56,594 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:56,617 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:56,618 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:56,628 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:56,629 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:57,228 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-23 15:15:57,230 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-23 15:15:57,231 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-23 15:15:57,233 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-23 15:15:57,234 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-23 15:15:57,235 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-23 15:15:57,236 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-23 15:15:57,241 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-23 15:15:57,242 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-23 15:15:57,243 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-23 15:15:57,531 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-23 15:15:57,551 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:57,560 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:57,741 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:57,742 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:57,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:15:57,893 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:15:57,910 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_5b21d819-7241-48c2-b6c2-f027d767b7e4/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2022-11-23 15:15:57,910 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_5b21d819-7241-48c2-b6c2-f027d767b7e4/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2022-11-23 15:15:57,955 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:57,956 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:57,956 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:57,957 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:57,958 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:57,965 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:57,966 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:57,967 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:57,968 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:58,007 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-23 15:15:58,009 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-23 15:15:58,009 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-23 15:15:58,010 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-23 15:15:58,012 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-23 15:15:58,012 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-23 15:15:58,013 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-23 15:15:58,014 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-23 15:15:58,015 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-23 15:15:58,015 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-23 15:15:58,041 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-23 15:15:58,047 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:58,047 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:58,098 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:58,098 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:15:58,134 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:15:58,509 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:15:58,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:58 WrapperNode [2022-11-23 15:15:58,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:15:58,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:15:58,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:15:58,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:15:58,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:58" (1/1) ... [2022-11-23 15:15:58,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:58" (1/1) ... [2022-11-23 15:15:58,768 INFO L138 Inliner]: procedures = 692, calls = 2499, calls flagged for inlining = 57, calls inlined = 12, statements flattened = 1002 [2022-11-23 15:15:58,769 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:15:58,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:15:58,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:15:58,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:15:58,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:58" (1/1) ... [2022-11-23 15:15:58,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:58" (1/1) ... [2022-11-23 15:15:58,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:58" (1/1) ... [2022-11-23 15:15:58,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:58" (1/1) ... [2022-11-23 15:15:58,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:58" (1/1) ... [2022-11-23 15:15:58,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:58" (1/1) ... [2022-11-23 15:15:58,833 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:58" (1/1) ... [2022-11-23 15:15:58,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:58" (1/1) ... [2022-11-23 15:15:58,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:15:58,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:15:58,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:15:58,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:15:58,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:58" (1/1) ... [2022-11-23 15:15:58,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:15:58,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:58,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:15:58,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:15:58,953 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-23 15:15:58,953 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-23 15:15:58,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:15:58,953 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-23 15:15:58,954 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-23 15:15:58,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:15:58,954 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2022-11-23 15:15:58,954 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2022-11-23 15:15:58,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 15:15:58,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 15:15:58,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:15:58,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:15:58,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:15:58,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:15:58,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:15:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-23 15:15:58,956 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-23 15:15:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2022-11-23 15:15:58,956 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2022-11-23 15:15:58,956 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-11-23 15:15:58,957 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-11-23 15:15:58,957 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:15:58,957 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:15:58,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:15:58,957 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2022-11-23 15:15:58,957 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2022-11-23 15:15:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:15:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:15:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-23 15:15:58,958 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-23 15:15:58,958 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2022-11-23 15:15:58,959 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2022-11-23 15:15:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:15:58,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:15:59,306 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:15:59,314 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:16:01,016 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:16:01,395 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:16:01,396 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-23 15:16:01,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:16:01 BoogieIcfgContainer [2022-11-23 15:16:01,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:16:01,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:16:01,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:16:01,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:16:01,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:15:54" (1/3) ... [2022-11-23 15:16:01,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6994e3a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:16:01, skipping insertion in model container [2022-11-23 15:16:01,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:58" (2/3) ... [2022-11-23 15:16:01,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6994e3a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:16:01, skipping insertion in model container [2022-11-23 15:16:01,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:16:01" (3/3) ... [2022-11-23 15:16:01,412 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_relative_harness.i [2022-11-23 15:16:01,437 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:16:01,438 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:16:01,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:16:01,532 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=FINITE_AUTOMATA, 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;@2da23351, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:16:01,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:16:01,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 72 states have internal predecessors, (95), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-23 15:16:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 15:16:01,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:16:01,550 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:16:01,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:16:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:16:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1580795549, now seen corresponding path program 1 times [2022-11-23 15:16:01,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:16:01,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360623079] [2022-11-23 15:16:01,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:16:01,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:16:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:16:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:16:02,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:16:02,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360623079] [2022-11-23 15:16:02,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360623079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:16:02,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:16:02,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:16:02,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386024097] [2022-11-23 15:16:02,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:16:02,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:16:02,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:16:02,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:16:02,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:16:02,761 INFO L87 Difference]: Start difference. First operand has 122 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 72 states have internal predecessors, (95), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 15:16:03,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:16:03,401 INFO L93 Difference]: Finished difference Result 235 states and 337 transitions. [2022-11-23 15:16:03,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:16:03,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 33 [2022-11-23 15:16:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:16:03,418 INFO L225 Difference]: With dead ends: 235 [2022-11-23 15:16:03,419 INFO L226 Difference]: Without dead ends: 124 [2022-11-23 15:16:03,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:16:03,437 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 5 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:16:03,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 709 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:16:03,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-23 15:16:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-11-23 15:16:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 73 states have internal predecessors, (87), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-23 15:16:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 162 transitions. [2022-11-23 15:16:03,524 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 162 transitions. Word has length 33 [2022-11-23 15:16:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:16:03,525 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 162 transitions. [2022-11-23 15:16:03,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-23 15:16:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 162 transitions. [2022-11-23 15:16:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 15:16:03,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:16:03,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:16:03,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:16:03,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:16:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:16:03,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1848825383, now seen corresponding path program 1 times [2022-11-23 15:16:03,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:16:03,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625252600] [2022-11-23 15:16:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:16:03,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:16:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:16:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:16:17,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:16:17,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625252600] [2022-11-23 15:16:17,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625252600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:16:17,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90994937] [2022-11-23 15:16:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:16:17,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:16:17,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:16:17,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:16:17,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:16:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:16:18,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 2437 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-23 15:16:18,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:16:18,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2022-11-23 15:16:18,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 15:16:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:16:27,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:16:27,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90994937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:16:27,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:16:27,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [14] total 29 [2022-11-23 15:16:27,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347115910] [2022-11-23 15:16:27,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:16:27,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 15:16:27,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:16:27,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 15:16:27,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-11-23 15:16:27,109 INFO L87 Difference]: Start difference. First operand 122 states and 162 transitions. Second operand has 20 states, 10 states have (on average 2.1) internal successors, (21), 14 states have internal predecessors, (21), 7 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-23 15:16:30,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:16:32,823 WARN L539 Checker$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] [2022-11-23 15:16:35,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:16:37,238 WARN L539 Checker$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] [2022-11-23 15:16:40,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:16:44,546 WARN L539 Checker$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] [2022-11-23 15:16:46,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:16:48,715 WARN L539 Checker$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] [2022-11-23 15:16:51,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:16:53,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:16:55,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:16:57,317 WARN L539 Checker$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] [2022-11-23 15:16:59,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:16:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:16:59,517 INFO L93 Difference]: Finished difference Result 229 states and 297 transitions. [2022-11-23 15:16:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 15:16:59,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 10 states have (on average 2.1) internal successors, (21), 14 states have internal predecessors, (21), 7 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 36 [2022-11-23 15:16:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:16:59,523 INFO L225 Difference]: With dead ends: 229 [2022-11-23 15:16:59,523 INFO L226 Difference]: Without dead ends: 216 [2022-11-23 15:16:59,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 15:16:59,526 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 241 mSDsluCounter, 1788 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 138 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:16:59,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1946 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1665 Invalid, 13 Unknown, 0 Unchecked, 31.5s Time] [2022-11-23 15:16:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-23 15:16:59,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2022-11-23 15:16:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 125 states have (on average 1.2) internal successors, (150), 130 states have internal predecessors, (150), 64 states have call successors, (64), 21 states have call predecessors, (64), 22 states have return successors, (63), 60 states have call predecessors, (63), 61 states have call successors, (63) [2022-11-23 15:16:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 277 transitions. [2022-11-23 15:16:59,572 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 277 transitions. Word has length 36 [2022-11-23 15:16:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:16:59,573 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 277 transitions. [2022-11-23 15:16:59,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 10 states have (on average 2.1) internal successors, (21), 14 states have internal predecessors, (21), 7 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-23 15:16:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 277 transitions. [2022-11-23 15:16:59,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 15:16:59,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:16:59,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:16:59,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:16:59,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:16:59,783 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:16:59,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:16:59,784 INFO L85 PathProgramCache]: Analyzing trace with hash -971205567, now seen corresponding path program 1 times [2022-11-23 15:16:59,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:16:59,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934564673] [2022-11-23 15:16:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:16:59,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:16:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:17:00,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:00,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934564673] [2022-11-23 15:17:00,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934564673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:17:00,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:17:00,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:17:00,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943056487] [2022-11-23 15:17:00,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:17:00,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:17:00,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:00,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:17:00,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:17:00,221 INFO L87 Difference]: Start difference. First operand 212 states and 277 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 15:17:00,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:00,774 INFO L93 Difference]: Finished difference Result 224 states and 289 transitions. [2022-11-23 15:17:00,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:17:00,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 38 [2022-11-23 15:17:00,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:00,789 INFO L225 Difference]: With dead ends: 224 [2022-11-23 15:17:00,789 INFO L226 Difference]: Without dead ends: 207 [2022-11-23 15:17:00,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:17:00,794 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 3 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:00,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 691 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:17:00,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-23 15:17:00,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2022-11-23 15:17:00,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 120 states have (on average 1.2) internal successors, (144), 124 states have internal predecessors, (144), 60 states have call successors, (60), 21 states have call predecessors, (60), 22 states have return successors, (60), 57 states have call predecessors, (60), 58 states have call successors, (60) [2022-11-23 15:17:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 264 transitions. [2022-11-23 15:17:00,867 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 264 transitions. Word has length 38 [2022-11-23 15:17:00,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:00,867 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 264 transitions. [2022-11-23 15:17:00,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-23 15:17:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 264 transitions. [2022-11-23 15:17:00,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 15:17:00,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:00,877 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:00,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:17:00,878 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:00,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:00,879 INFO L85 PathProgramCache]: Analyzing trace with hash -307444266, now seen corresponding path program 1 times [2022-11-23 15:17:00,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:00,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692847010] [2022-11-23 15:17:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:00,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:17:01,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:01,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692847010] [2022-11-23 15:17:01,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692847010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:17:01,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:17:01,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:17:01,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462824611] [2022-11-23 15:17:01,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:17:01,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:17:01,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:01,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:17:01,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:17:01,304 INFO L87 Difference]: Start difference. First operand 203 states and 264 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-23 15:17:01,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:01,744 INFO L93 Difference]: Finished difference Result 213 states and 273 transitions. [2022-11-23 15:17:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:17:01,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 47 [2022-11-23 15:17:01,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:01,747 INFO L225 Difference]: With dead ends: 213 [2022-11-23 15:17:01,747 INFO L226 Difference]: Without dead ends: 198 [2022-11-23 15:17:01,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:17:01,748 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 1 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:01,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 534 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 15:17:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-23 15:17:01,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-23 15:17:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 117 states have (on average 1.1965811965811965) internal successors, (140), 121 states have internal predecessors, (140), 58 states have call successors, (58), 21 states have call predecessors, (58), 22 states have return successors, (58), 55 states have call predecessors, (58), 56 states have call successors, (58) [2022-11-23 15:17:01,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 256 transitions. [2022-11-23 15:17:01,779 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 256 transitions. Word has length 47 [2022-11-23 15:17:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:01,780 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 256 transitions. [2022-11-23 15:17:01,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-23 15:17:01,780 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 256 transitions. [2022-11-23 15:17:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-23 15:17:01,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:01,782 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:01,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:17:01,782 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:01,783 INFO L85 PathProgramCache]: Analyzing trace with hash 2080313959, now seen corresponding path program 1 times [2022-11-23 15:17:01,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:01,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184468106] [2022-11-23 15:17:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:01,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:17:04,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:04,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184468106] [2022-11-23 15:17:04,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184468106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:17:04,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:17:04,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:17:04,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344909459] [2022-11-23 15:17:04,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:17:04,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:17:04,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:04,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:17:04,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:17:04,239 INFO L87 Difference]: Start difference. First operand 198 states and 256 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-23 15:17:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:17:05,459 INFO L93 Difference]: Finished difference Result 383 states and 498 transitions. [2022-11-23 15:17:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:17:05,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 51 [2022-11-23 15:17:05,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:17:05,463 INFO L225 Difference]: With dead ends: 383 [2022-11-23 15:17:05,463 INFO L226 Difference]: Without dead ends: 198 [2022-11-23 15:17:05,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:17:05,465 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 60 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:17:05,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 567 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 15:17:05,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-23 15:17:05,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-23 15:17:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 117 states have (on average 1.188034188034188) internal successors, (139), 121 states have internal predecessors, (139), 58 states have call successors, (58), 21 states have call predecessors, (58), 22 states have return successors, (58), 55 states have call predecessors, (58), 56 states have call successors, (58) [2022-11-23 15:17:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 255 transitions. [2022-11-23 15:17:05,510 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 255 transitions. Word has length 51 [2022-11-23 15:17:05,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:17:05,510 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 255 transitions. [2022-11-23 15:17:05,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-23 15:17:05,510 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 255 transitions. [2022-11-23 15:17:05,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 15:17:05,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:17:05,514 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:17:05,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:17:05,514 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:17:05,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:17:05,516 INFO L85 PathProgramCache]: Analyzing trace with hash -574299073, now seen corresponding path program 1 times [2022-11-23 15:17:05,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:17:05,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521984778] [2022-11-23 15:17:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:05,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:17:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:17:19,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:17:19,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521984778] [2022-11-23 15:17:19,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521984778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:17:19,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550161668] [2022-11-23 15:17:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:17:19,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:17:19,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:17:19,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:17:19,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:17:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:17:20,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 2560 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-23 15:17:20,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:17:20,332 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 [2022-11-23 15:17:20,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 15:17:23,392 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 15:17:23,404 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 15:17:23,419 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 15:17:23,424 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 15:17:26,508 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:17:26,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 78 treesize of output 62 [2022-11-23 15:17:26,591 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:17:26,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 15:17:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:17:26,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:17:26,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550161668] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:17:26,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:17:26,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [17] total 28 [2022-11-23 15:17:26,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907456292] [2022-11-23 15:17:26,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:17:26,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 15:17:26,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:17:26,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 15:17:26,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-11-23 15:17:26,959 INFO L87 Difference]: Start difference. First operand 198 states and 255 transitions. Second operand has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-23 15:17:30,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:17:32,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:17:35,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:17:37,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:17:39,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:17:42,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:17:46,192 WARN L539 Checker$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] [2022-11-23 15:17:48,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:17:50,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:17:52,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:17:54,595 WARN L539 Checker$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] [2022-11-23 15:17:56,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:17:58,999 WARN L539 Checker$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] [2022-11-23 15:18:01,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:18:03,099 WARN L539 Checker$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] [2022-11-23 15:18:05,197 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] [2022-11-23 15:18:05,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:05,299 INFO L93 Difference]: Finished difference Result 218 states and 269 transitions. [2022-11-23 15:18:05,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 15:18:05,300 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) Word has length 55 [2022-11-23 15:18:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:05,302 INFO L225 Difference]: With dead ends: 218 [2022-11-23 15:18:05,302 INFO L226 Difference]: Without dead ends: 216 [2022-11-23 15:18:05,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 15:18:05,305 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 227 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 187 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:05,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1221 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1636 Invalid, 16 Unknown, 0 Unchecked, 37.2s Time] [2022-11-23 15:18:05,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-23 15:18:05,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2022-11-23 15:18:05,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 125 states have (on average 1.176) internal successors, (147), 130 states have internal predecessors, (147), 58 states have call successors, (58), 26 states have call predecessors, (58), 28 states have return successors, (59), 55 states have call predecessors, (59), 56 states have call successors, (59) [2022-11-23 15:18:05,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 264 transitions. [2022-11-23 15:18:05,346 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 264 transitions. Word has length 55 [2022-11-23 15:18:05,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:05,347 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 264 transitions. [2022-11-23 15:18:05,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-23 15:18:05,347 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 264 transitions. [2022-11-23 15:18:05,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-23 15:18:05,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:05,348 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:18:05,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 15:18:05,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 15:18:05,559 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:05,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:05,560 INFO L85 PathProgramCache]: Analyzing trace with hash 113466188, now seen corresponding path program 1 times [2022-11-23 15:18:05,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:05,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992091877] [2022-11-23 15:18:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:05,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 15:18:06,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:06,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992091877] [2022-11-23 15:18:06,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992091877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:18:06,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:18:06,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:18:06,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74249130] [2022-11-23 15:18:06,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:18:06,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:18:06,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:18:06,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:18:06,020 INFO L87 Difference]: Start difference. First operand 212 states and 264 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-23 15:18:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:06,683 INFO L93 Difference]: Finished difference Result 258 states and 318 transitions. [2022-11-23 15:18:06,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:18:06,684 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 57 [2022-11-23 15:18:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:06,687 INFO L225 Difference]: With dead ends: 258 [2022-11-23 15:18:06,687 INFO L226 Difference]: Without dead ends: 224 [2022-11-23 15:18:06,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:18:06,689 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 9 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:06,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 792 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:18:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-23 15:18:06,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 216. [2022-11-23 15:18:06,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 129 states have (on average 1.1705426356589148) internal successors, (151), 134 states have internal predecessors, (151), 58 states have call successors, (58), 26 states have call predecessors, (58), 28 states have return successors, (59), 55 states have call predecessors, (59), 56 states have call successors, (59) [2022-11-23 15:18:06,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 268 transitions. [2022-11-23 15:18:06,754 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 268 transitions. Word has length 57 [2022-11-23 15:18:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:06,757 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 268 transitions. [2022-11-23 15:18:06,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2022-11-23 15:18:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 268 transitions. [2022-11-23 15:18:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 15:18:06,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:06,760 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:18:06,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:18:06,760 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:06,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:06,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1144569758, now seen corresponding path program 1 times [2022-11-23 15:18:06,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:06,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056133390] [2022-11-23 15:18:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:06,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:18:10,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:10,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056133390] [2022-11-23 15:18:10,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056133390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:18:10,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:18:10,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-23 15:18:10,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910134349] [2022-11-23 15:18:10,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:18:10,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 15:18:10,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:18:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 15:18:10,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:18:10,570 INFO L87 Difference]: Start difference. First operand 216 states and 268 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-23 15:18:13,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:18:13,782 INFO L93 Difference]: Finished difference Result 302 states and 376 transitions. [2022-11-23 15:18:13,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 15:18:13,783 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 60 [2022-11-23 15:18:13,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:18:13,785 INFO L225 Difference]: With dead ends: 302 [2022-11-23 15:18:13,785 INFO L226 Difference]: Without dead ends: 270 [2022-11-23 15:18:13,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-11-23 15:18:13,787 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 249 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:18:13,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 463 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-23 15:18:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-23 15:18:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 212. [2022-11-23 15:18:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 132 states have internal predecessors, (147), 56 states have call successors, (56), 26 states have call predecessors, (56), 28 states have return successors, (57), 53 states have call predecessors, (57), 54 states have call successors, (57) [2022-11-23 15:18:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 260 transitions. [2022-11-23 15:18:13,849 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 260 transitions. Word has length 60 [2022-11-23 15:18:13,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:18:13,849 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 260 transitions. [2022-11-23 15:18:13,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-23 15:18:13,850 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 260 transitions. [2022-11-23 15:18:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 15:18:13,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:18:13,851 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 15:18:13,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:18:13,851 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:18:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:18:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash -397832089, now seen corresponding path program 1 times [2022-11-23 15:18:13,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:18:13,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479557227] [2022-11-23 15:18:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:13,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:18:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:18:32,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:18:32,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479557227] [2022-11-23 15:18:32,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479557227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:18:32,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23831728] [2022-11-23 15:18:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:18:32,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:18:32,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:18:32,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:18:32,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b21d819-7241-48c2-b6c2-f027d767b7e4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:18:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:18:32,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 2599 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-23 15:18:32,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:18:33,183 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 [2022-11-23 15:18:44,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2022-11-23 15:18:44,187 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 15:18:44,200 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 15:18:44,935 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_349 Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_int)| |c_aws_add_size_checked_#in~r#1.base|) |c_aws_add_size_checked_#in~r#1.offset| v_ArrVal_349)))) (exists ((v_ArrVal_348 Int)) (= (store |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base| (store (select |c_old(#memory_$Pointer$.base)| |c_aws_add_size_checked_#in~r#1.base|) |c_aws_add_size_checked_#in~r#1.offset| v_ArrVal_348)) |c_#memory_$Pointer$.base|))) is different from true [2022-11-23 15:18:44,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-23 15:18:44,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:18:44,995 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 15:18:44,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 40 treesize of output 40 [2022-11-23 15:18:53,391 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:18:53,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 72 [2022-11-23 15:18:53,474 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:18:53,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-23 15:18:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:18:53,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:18:57,243 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-11-23 15:27:39,148 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.