./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_swap_contents_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7 --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 877e83a63a602219ce02028b5212cf6c29aa8f33a031ee39d52c3c671213dc91 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:29:13,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:29:13,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:29:13,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:29:13,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:29:13,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:29:13,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:29:13,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:29:13,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:29:13,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:29:13,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:29:13,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:29:13,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:29:13,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:29:13,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:29:13,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:29:13,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:29:13,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:29:13,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:29:13,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:29:13,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:29:13,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:29:13,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:29:13,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:29:13,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:29:13,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:29:13,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:29:13,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:29:13,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:29:13,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:29:13,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:29:13,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:29:13,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:29:13,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:29:13,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:29:13,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:29:13,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:29:13,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:29:13,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:29:13,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:29:13,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:29:13,490 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 20:29:13,531 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:29:13,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:29:13,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:29:13,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:29:13,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:29:13,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:29:13,533 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:29:13,533 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:29:13,534 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:29:13,534 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:29:13,535 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:29:13,535 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:29:13,535 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:29:13,535 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:29:13,535 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:29:13,536 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:29:13,536 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:29:13,536 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:29:13,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:29:13,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:29:13,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:29:13,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:29:13,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:29:13,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:29:13,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:29:13,538 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:29:13,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:29:13,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:29:13,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:29:13,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:29:13,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:29:13,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:29:13,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:29:13,541 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:29:13,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:29:13,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:29:13,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:29:13,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:29:13,542 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 877e83a63a602219ce02028b5212cf6c29aa8f33a031ee39d52c3c671213dc91 [2021-11-25 20:29:13,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:29:13,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:29:13,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:29:13,839 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:29:13,840 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:29:13,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_array_list_swap_contents_harness.i [2021-11-25 20:29:13,912 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/data/d475c9c45/0c4268d8f83341eba2fbfee722f7c89e/FLAG7f7b808d1 [2021-11-25 20:29:14,637 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:29:14,637 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/sv-benchmarks/c/aws-c-common/aws_array_list_swap_contents_harness.i [2021-11-25 20:29:14,674 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/data/d475c9c45/0c4268d8f83341eba2fbfee722f7c89e/FLAG7f7b808d1 [2021-11-25 20:29:14,749 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/data/d475c9c45/0c4268d8f83341eba2fbfee722f7c89e [2021-11-25 20:29:14,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:29:14,755 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:29:14,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:29:14,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:29:14,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:29:14,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:29:14" (1/1) ... [2021-11-25 20:29:14,762 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60e7e5d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:14, skipping insertion in model container [2021-11-25 20:29:14,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:29:14" (1/1) ... [2021-11-25 20:29:14,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:29:14,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:29:15,119 WARN L230 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_76b384fc-049d-439e-930a-d2b2974915ed/sv-benchmarks/c/aws-c-common/aws_array_list_swap_contents_harness.i[4502,4515] [2021-11-25 20:29:15,126 WARN L230 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_76b384fc-049d-439e-930a-d2b2974915ed/sv-benchmarks/c/aws-c-common/aws_array_list_swap_contents_harness.i[4562,4575] [2021-11-25 20:29:15,902 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 20:29:15,985 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:15,986 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:15,987 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:15,987 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:15,991 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,007 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,007 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,010 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,012 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,014 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,016 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,017 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,019 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,380 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 20:29:16,381 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 20:29:16,382 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 20:29:16,383 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 20:29:16,385 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 20:29:16,385 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 20:29:16,386 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 20:29:16,387 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 20:29:16,387 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 20:29:16,388 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 20:29:16,567 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,591 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:29:16,699 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:29:16,713 WARN L230 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_76b384fc-049d-439e-930a-d2b2974915ed/sv-benchmarks/c/aws-c-common/aws_array_list_swap_contents_harness.i[4502,4515] [2021-11-25 20:29:16,714 WARN L230 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_76b384fc-049d-439e-930a-d2b2974915ed/sv-benchmarks/c/aws-c-common/aws_array_list_swap_contents_harness.i[4562,4575] [2021-11-25 20:29:16,754 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 20:29:16,783 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,788 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,789 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,789 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,790 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,797 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,797 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,798 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,799 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,800 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,800 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,801 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,801 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,837 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 20:29:16,838 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 20:29:16,839 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 20:29:16,840 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 20:29:16,841 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 20:29:16,841 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 20:29:16,842 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 20:29:16,842 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 20:29:16,843 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 20:29:16,844 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 20:29:16,876 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,881 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:29:16,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:29:17,224 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:29:17,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:17 WrapperNode [2021-11-25 20:29:17,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:29:17,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:29:17,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:29:17,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:29:17,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:17" (1/1) ... [2021-11-25 20:29:17,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:17" (1/1) ... [2021-11-25 20:29:17,436 INFO L137 Inliner]: procedures = 690, calls = 1715, calls flagged for inlining = 51, calls inlined = 7, statements flattened = 681 [2021-11-25 20:29:17,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:29:17,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:29:17,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:29:17,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:29:17,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:17" (1/1) ... [2021-11-25 20:29:17,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:17" (1/1) ... [2021-11-25 20:29:17,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:17" (1/1) ... [2021-11-25 20:29:17,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:17" (1/1) ... [2021-11-25 20:29:17,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:17" (1/1) ... [2021-11-25 20:29:17,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:17" (1/1) ... [2021-11-25 20:29:17,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:17" (1/1) ... [2021-11-25 20:29:17,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:29:17,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:29:17,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:29:17,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:29:17,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:17" (1/1) ... [2021-11-25 20:29:17,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:29:17,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:29:17,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:29:17,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:29:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:29:17,627 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-11-25 20:29:17,627 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-11-25 20:29:17,628 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-25 20:29:17,628 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-25 20:29:17,628 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-25 20:29:17,628 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-25 20:29:17,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:29:17,628 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-25 20:29:17,628 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-25 20:29:17,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 20:29:17,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 20:29:17,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:29:17,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:29:17,629 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-25 20:29:17,630 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-25 20:29:17,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:29:17,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:29:17,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:29:17,631 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-25 20:29:17,631 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-25 20:29:17,631 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-25 20:29:17,631 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-25 20:29:17,632 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-25 20:29:17,632 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-25 20:29:17,632 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 20:29:17,632 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 20:29:17,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:29:17,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:29:17,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:29:17,633 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-25 20:29:17,633 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-25 20:29:17,633 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-25 20:29:17,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-25 20:29:17,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:29:17,634 INFO L130 BoogieDeclarations]: Found specification of procedure assert_array_list_equivalence [2021-11-25 20:29:17,634 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_array_list_equivalence [2021-11-25 20:29:17,634 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-11-25 20:29:17,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-11-25 20:29:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:29:18,001 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:29:18,004 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:29:19,514 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:29:19,595 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:29:19,595 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 20:29:19,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:29:19 BoogieIcfgContainer [2021-11-25 20:29:19,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:29:19,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:29:19,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:29:19,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:29:19,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:29:14" (1/3) ... [2021-11-25 20:29:19,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8a95e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:29:19, skipping insertion in model container [2021-11-25 20:29:19,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:29:17" (2/3) ... [2021-11-25 20:29:19,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8a95e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:29:19, skipping insertion in model container [2021-11-25 20:29:19,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:29:19" (3/3) ... [2021-11-25 20:29:19,606 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_swap_contents_harness.i [2021-11-25 20:29:19,611 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:29:19,611 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:29:19,659 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:29:19,665 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:29:19,665 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:29:19,686 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 69 states have (on average 1.144927536231884) internal successors, (79), 70 states have internal predecessors, (79), 52 states have call successors, (52), 14 states have call predecessors, (52), 14 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-25 20:29:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-25 20:29:19,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:19,700 INFO L514 BasicCegarLoop]: trace histogram [17, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:19,700 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:29:19,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:19,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1315314645, now seen corresponding path program 1 times [2021-11-25 20:29:19,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:19,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948146498] [2021-11-25 20:29:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:19,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-11-25 20:29:20,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:20,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948146498] [2021-11-25 20:29:20,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948146498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:29:20,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769224715] [2021-11-25 20:29:20,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:20,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:29:20,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:29:20,501 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:29:20,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:29:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:21,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 2592 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:29:21,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:29:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-11-25 20:29:21,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:29:21,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769224715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:21,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:29:21,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-25 20:29:21,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520322439] [2021-11-25 20:29:21,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:21,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:29:21,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:21,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:29:21,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:29:21,599 INFO L87 Difference]: Start difference. First operand has 137 states, 69 states have (on average 1.144927536231884) internal successors, (79), 70 states have internal predecessors, (79), 52 states have call successors, (52), 14 states have call predecessors, (52), 14 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:29:22,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:22,152 INFO L93 Difference]: Finished difference Result 270 states and 378 transitions. [2021-11-25 20:29:22,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:29:22,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 133 [2021-11-25 20:29:22,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:22,168 INFO L225 Difference]: With dead ends: 270 [2021-11-25 20:29:22,168 INFO L226 Difference]: Without dead ends: 137 [2021-11-25 20:29:22,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:29:22,184 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 24 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:22,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 550 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:29:22,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-25 20:29:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-25 20:29:22,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 71 states have internal predecessors, (78), 52 states have call successors, (52), 14 states have call predecessors, (52), 15 states have return successors, (57), 51 states have call predecessors, (57), 51 states have call successors, (57) [2021-11-25 20:29:22,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 187 transitions. [2021-11-25 20:29:22,267 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 187 transitions. Word has length 133 [2021-11-25 20:29:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:22,268 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 187 transitions. [2021-11-25 20:29:22,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:29:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 187 transitions. [2021-11-25 20:29:22,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-25 20:29:22,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:22,285 INFO L514 BasicCegarLoop]: trace histogram [17, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:22,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:29:22,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 20:29:22,501 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:29:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:22,501 INFO L85 PathProgramCache]: Analyzing trace with hash 53104247, now seen corresponding path program 1 times [2021-11-25 20:29:22,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:22,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175389851] [2021-11-25 20:29:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:22,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:22,609 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:29:22,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268609597] [2021-11-25 20:29:22,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:22,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:29:22,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:29:22,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:29:22,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:29:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:29:23,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 2724 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:29:23,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:29:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-25 20:29:23,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:29:23,416 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:23,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175389851] [2021-11-25 20:29:23,416 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:29:23,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268609597] [2021-11-25 20:29:23,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268609597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:23,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:23,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:29:23,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514637127] [2021-11-25 20:29:23,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:23,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:29:23,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:23,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:29:23,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:29:23,422 INFO L87 Difference]: Start difference. First operand 137 states and 187 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:29:23,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:23,973 INFO L93 Difference]: Finished difference Result 236 states and 323 transitions. [2021-11-25 20:29:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:29:23,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 142 [2021-11-25 20:29:23,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:23,980 INFO L225 Difference]: With dead ends: 236 [2021-11-25 20:29:23,981 INFO L226 Difference]: Without dead ends: 137 [2021-11-25 20:29:23,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:29:23,987 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 22 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:23,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 547 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:29:23,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-25 20:29:24,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-25 20:29:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 71 states have internal predecessors, (78), 52 states have call successors, (52), 14 states have call predecessors, (52), 15 states have return successors, (55), 51 states have call predecessors, (55), 51 states have call successors, (55) [2021-11-25 20:29:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 185 transitions. [2021-11-25 20:29:24,019 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 185 transitions. Word has length 142 [2021-11-25 20:29:24,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:24,021 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 185 transitions. [2021-11-25 20:29:24,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:29:24,022 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 185 transitions. [2021-11-25 20:29:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-25 20:29:24,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:24,026 INFO L514 BasicCegarLoop]: trace histogram [17, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:24,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 20:29:24,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:29:24,248 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:29:24,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:24,249 INFO L85 PathProgramCache]: Analyzing trace with hash -811212753, now seen corresponding path program 2 times [2021-11-25 20:29:24,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:24,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775816816] [2021-11-25 20:29:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:24,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:24,353 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:29:24,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42989163] [2021-11-25 20:29:24,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:29:24,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:29:24,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:29:24,355 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:29:24,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:29:25,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:29:25,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:29:25,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 2062 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:29:25,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:29:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-11-25 20:29:26,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:29:26,023 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:26,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775816816] [2021-11-25 20:29:26,024 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:29:26,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42989163] [2021-11-25 20:29:26,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42989163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:26,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:26,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:29:26,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340922967] [2021-11-25 20:29:26,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:26,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:29:26,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:26,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:29:26,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:29:26,028 INFO L87 Difference]: Start difference. First operand 137 states and 185 transitions. Second operand has 5 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:29:26,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:26,996 INFO L93 Difference]: Finished difference Result 201 states and 268 transitions. [2021-11-25 20:29:27,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:29:27,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 151 [2021-11-25 20:29:27,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:27,003 INFO L225 Difference]: With dead ends: 201 [2021-11-25 20:29:27,003 INFO L226 Difference]: Without dead ends: 137 [2021-11-25 20:29:27,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:29:27,005 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 0 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:27,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 575 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 20:29:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-25 20:29:27,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-25 20:29:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 71 states have internal predecessors, (78), 52 states have call successors, (52), 14 states have call predecessors, (52), 15 states have return successors, (54), 51 states have call predecessors, (54), 51 states have call successors, (54) [2021-11-25 20:29:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 184 transitions. [2021-11-25 20:29:27,021 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 184 transitions. Word has length 151 [2021-11-25 20:29:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:27,022 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 184 transitions. [2021-11-25 20:29:27,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2021-11-25 20:29:27,023 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 184 transitions. [2021-11-25 20:29:27,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-25 20:29:27,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:27,025 INFO L514 BasicCegarLoop]: trace histogram [17, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:27,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:29:27,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:29:27,240 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:29:27,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:27,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1427972551, now seen corresponding path program 3 times [2021-11-25 20:29:27,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:27,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198760200] [2021-11-25 20:29:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:27,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:27,344 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:29:27,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901138314] [2021-11-25 20:29:27,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 20:29:27,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:29:27,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:29:27,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:29:27,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:29:27,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 20:29:27,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:29:27,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 2988 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:29:27,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:29:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-25 20:29:28,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:29:28,280 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:29:28,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198760200] [2021-11-25 20:29:28,281 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:29:28,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901138314] [2021-11-25 20:29:28,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901138314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:29:28,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:29:28,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:29:28,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489006900] [2021-11-25 20:29:28,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:29:28,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:29:28,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:29:28,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:29:28,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:29:28,283 INFO L87 Difference]: Start difference. First operand 137 states and 184 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-25 20:29:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:29:29,781 INFO L93 Difference]: Finished difference Result 206 states and 273 transitions. [2021-11-25 20:29:29,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:29:29,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 160 [2021-11-25 20:29:29,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:29:29,789 INFO L225 Difference]: With dead ends: 206 [2021-11-25 20:29:29,789 INFO L226 Difference]: Without dead ends: 137 [2021-11-25 20:29:29,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:29:29,791 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 21 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:29:29,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 671 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 20:29:29,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-25 20:29:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-25 20:29:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 71 states have internal predecessors, (78), 52 states have call successors, (52), 14 states have call predecessors, (52), 15 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2021-11-25 20:29:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 182 transitions. [2021-11-25 20:29:29,807 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 182 transitions. Word has length 160 [2021-11-25 20:29:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:29:29,808 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 182 transitions. [2021-11-25 20:29:29,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 4 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2021-11-25 20:29:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 182 transitions. [2021-11-25 20:29:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-25 20:29:29,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:29:29,812 INFO L514 BasicCegarLoop]: trace histogram [17, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:29:29,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:29:30,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:29:30,036 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:29:30,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:29:30,037 INFO L85 PathProgramCache]: Analyzing trace with hash -539264431, now seen corresponding path program 1 times [2021-11-25 20:29:30,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:29:30,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625508510] [2021-11-25 20:29:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:30,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:29:30,151 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:29:30,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931510985] [2021-11-25 20:29:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:29:30,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:29:30,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:29:30,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:29:30,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76b384fc-049d-439e-930a-d2b2974915ed/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:30:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:47,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 3252 conjuncts, 499 conjunts are in the unsatisfiable core [2021-11-25 20:30:47,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:30:47,377 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 20:30:47,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-11-25 20:30:50,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:50,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:50,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:30:50,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 20:30:51,585 INFO L354 Elim1Store]: treesize reduction 106, result has 23.2 percent of original size [2021-11-25 20:30:51,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 53 [2021-11-25 20:30:51,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 29 [2021-11-25 20:31:00,013 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-25 20:31:00,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 20:31:00,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:00,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 20:31:00,196 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:31:00,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 61 [2021-11-25 20:31:00,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:00,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:00,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:00,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2021-11-25 20:31:05,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:05,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 81 treesize of output 69 [2021-11-25 20:31:05,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:05,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 67 treesize of output 55 [2021-11-25 20:31:05,287 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-11-25 20:31:05,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 45 [2021-11-25 20:31:05,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:05,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:05,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:05,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:05,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:31:05,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:05,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:31:05,467 INFO L354 Elim1Store]: treesize reduction 52, result has 42.9 percent of original size [2021-11-25 20:31:05,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 99 treesize of output 134 [2021-11-25 20:31:22,690 INFO L354 Elim1Store]: treesize reduction 161, result has 21.5 percent of original size [2021-11-25 20:31:22,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 39 treesize of output 68 [2021-11-25 20:31:23,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:31:23,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 70 treesize of output 62 [2021-11-25 20:31:25,039 INFO L354 Elim1Store]: treesize reduction 182, result has 24.2 percent of original size [2021-11-25 20:31:25,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 44 treesize of output 85 [2021-11-25 20:31:27,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:31:27,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 70 treesize of output 62 [2021-11-25 20:31:33,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:31:33,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2021-11-25 20:31:33,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:31:33,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 15 treesize of output 15 [2021-11-25 20:31:42,890 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|v___CPROVER_overflow_mult_~#c~1.base_30| Int) (v_ArrVal_1443 Int)) (and (= (select |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_30|) 0) (= |c_#valid| (store |c_old(#valid)| |v___CPROVER_overflow_mult_~#c~1.base_30| v_ArrVal_1443)))) (exists ((v_ArrVal_1466 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_aws_mul_size_checked_#in~r#1.base| v_ArrVal_1466)))) is different from true [2021-11-25 20:31:43,707 INFO L354 Elim1Store]: treesize reduction 212, result has 25.1 percent of original size [2021-11-25 20:31:43,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 52 treesize of output 101 [2021-11-25 20:31:43,753 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:31:43,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 14 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 80 [2021-11-25 20:31:43,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-25 20:31:59,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:59,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:59,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:59,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:59,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:59,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:59,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:59,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:59,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:31:59,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 86 [2021-11-25 20:31:59,880 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-11-25 20:31:59,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 39 [2021-11-25 20:32:13,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:13,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:13,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:13,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:13,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:13,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:13,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:15,146 WARN L177 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (let ((.cse0 (select |v_#memory_int_134| |ULTIMATE.start_aws_array_list_swap_contents_~list_b#1.base|))) (= (select .cse0 16) (select .cse0 24))) [2021-11-25 20:32:15,146 INFO L244 Elim1Store]: Index analysis took 2095 ms [2021-11-25 20:32:15,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 55 [2021-11-25 20:32:15,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2021-11-25 20:32:15,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:15,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:15,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 8 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 68 [2021-11-25 20:32:33,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 106 [2021-11-25 20:32:33,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 100 [2021-11-25 20:32:51,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:32:51,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 75 [2021-11-25 20:32:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 79 proven. 283 refuted. 2 times theorem prover too weak. 46 trivial. 8 not checked. [2021-11-25 20:32:54,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:33:18,549 WARN L227 SmtUtils]: Spent 20.67s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 271] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 20:33:41,765 WARN L227 SmtUtils]: Spent 23.18s on a formula simplification. DAG size of input: 330 DAG size of output: 140 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 20:33:49,931 WARN L227 SmtUtils]: Spent 8.16s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 271] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 20:33:52,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-25 20:33:52,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-11-25 20:40:48,204 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_aws_mul_size_checked_#in~r#1.base_7| Int)) (let ((.cse1 (+ 24 |c_ULTIMATE.start_aws_array_list_swap_contents_~list_a#1.offset|))) (let ((.cse3 (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_aws_array_list_swap_contents_~list_a#1.base|))) (* (select .cse4 .cse1) (select .cse4 (+ 16 |c_ULTIMATE.start_aws_array_list_swap_contents_~list_a#1.offset|)))))) (let ((.cse0 (select (store |c_#memory_int| |v_aws_mul_size_checked_#in~r#1.base_7| (store (select |c_#memory_int| |v_aws_mul_size_checked_#in~r#1.base_7|) 0 .cse3)) |c_ULTIMATE.start_aws_array_list_swap_contents_~list_a#1.base|))) (let ((.cse2 (mod (select .cse0 (+ 8 |c_ULTIMATE.start_aws_array_list_swap_contents_~list_a#1.offset|)) 18446744073709551616))) (or (and (not (= (mod (select .cse0 .cse1) 18446744073709551616) 0)) (= .cse2 0)) (< .cse2 (mod .cse3 18446744073709551616)))))))) (forall ((|v_aws_mul_size_checked_#in~r#1.base_7| Int)) (let ((.cse5 (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_aws_array_list_swap_contents_~list_a#1.base|))) (* (select .cse6 (+ 24 |c_ULTIMATE.start_aws_array_list_swap_contents_~list_a#1.offset|)) (select .cse6 (+ 16 |c_ULTIMATE.start_aws_array_list_swap_contents_~list_a#1.offset|)))))) (<= (mod .cse5 18446744073709551616) (mod (select (select (store |c_#memory_int| |v_aws_mul_size_checked_#in~r#1.base_7| (store (select |c_#memory_int| |v_aws_mul_size_checked_#in~r#1.base_7|) 0 .cse5)) |c_ULTIMATE.start_aws_array_list_swap_contents_~list_a#1.base|) (+ 8 |c_ULTIMATE.start_aws_array_list_swap_contents_~list_a#1.offset|)) 18446744073709551616))))) is different from false [2021-11-25 20:40:48,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:40:48,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625508510] [2021-11-25 20:40:48,257 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:40:48,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931510985] [2021-11-25 20:40:48,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931510985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:40:48,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1504597721] [2021-11-25 20:40:48,289 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2021-11-25 20:40:48,289 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:40:48,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:40:48,308 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:40:48,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:40:51,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:40:51,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:40:51,594 INFO L244 Elim1Store]: Index analysis took 732 ms [2021-11-25 20:42:40,702 WARN L227 SmtUtils]: Spent 1.82m on a formula simplification. DAG size of input: 3151 DAG size of output: 1575 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 20:42:40,706 INFO L354 Elim1Store]: treesize reduction 7470, result has 25.5 percent of original size [2021-11-25 20:42:40,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 200 select indices, 200 select index equivalence classes, 19507 disjoint index pairs (out of 19900 index pairs), introduced 200 new quantified variables, introduced 591 case distinctions, treesize of input 1014 treesize of output 3173 [2021-11-25 20:42:43,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:43,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:43,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 197 select indices, 197 select index equivalence classes, 19703 disjoint index pairs (out of 19306 index pairs), introduced 197 new quantified variables, introduced 0 case distinctions, treesize of input 995 treesize of output 1587