./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V --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 4e3d62ab3962e5958dc41169c7885079de47f5dcf75079068205793f151a2e2b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:54:42,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:54:42,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:54:42,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:54:42,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:54:42,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:54:42,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:54:42,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:54:42,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:54:42,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:54:42,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:54:42,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:54:42,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:54:42,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:54:42,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:54:42,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:54:42,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:54:42,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:54:42,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:54:42,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:54:42,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:54:42,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:54:42,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:54:42,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:54:42,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:54:42,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:54:42,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:54:42,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:54:42,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:54:42,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:54:42,295 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:54:42,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:54:42,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:54:42,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:54:42,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:54:42,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:54:42,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:54:42,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:54:42,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:54:42,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:54:42,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:54:42,305 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:54:42,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:54:42,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:54:42,366 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:54:42,366 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:54:42,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:54:42,374 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:54:42,374 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:54:42,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:54:42,374 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:54:42,375 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:54:42,376 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:54:42,376 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:54:42,376 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:54:42,376 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:54:42,377 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:54:42,377 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:54:42,377 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:54:42,377 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:54:42,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:54:42,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:54:42,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:54:42,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:54:42,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:54:42,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:54:42,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:54:42,379 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:54:42,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:54:42,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:54:42,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:54:42,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:54:42,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:54:42,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:54:42,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:54:42,390 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:54:42,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:54:42,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:54:42,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:54:42,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:54:42,391 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_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e3d62ab3962e5958dc41169c7885079de47f5dcf75079068205793f151a2e2b [2021-11-23 02:54:42,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:54:42,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:54:42,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:54:42,680 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:54:42,681 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:54:42,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i [2021-11-23 02:54:42,748 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/data/f2885a2f2/d58db79dd1e643c7bb26215954ca2683/FLAGa01f3a8cc [2021-11-23 02:54:43,580 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:54:43,581 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i [2021-11-23 02:54:43,622 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/data/f2885a2f2/d58db79dd1e643c7bb26215954ca2683/FLAGa01f3a8cc [2021-11-23 02:54:44,059 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/data/f2885a2f2/d58db79dd1e643c7bb26215954ca2683 [2021-11-23 02:54:44,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:54:44,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:54:44,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:54:44,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:54:44,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:54:44,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:54:44" (1/1) ... [2021-11-23 02:54:44,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9c6a876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:44, skipping insertion in model container [2021-11-23 02:54:44,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:54:44" (1/1) ... [2021-11-23 02:54:44,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:54:44,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:54:44,459 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_1aba19ef-f894-439c-93ea-77efcfca5838/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i[4497,4510] [2021-11-23 02:54:44,468 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_1aba19ef-f894-439c-93ea-77efcfca5838/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i[4557,4570] [2021-11-23 02:54:45,575 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 02:54:45,650 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:45,651 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:45,651 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:45,652 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:45,653 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:45,668 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:45,668 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:45,670 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:45,671 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:45,673 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:45,674 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:45,675 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:45,675 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,062 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:54:46,076 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:54:46,082 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:54:46,083 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:54:46,090 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:54:46,091 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:54:46,091 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:54:46,092 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:54:46,093 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:54:46,094 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:54:46,245 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,253 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:54:46,364 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:54:46,394 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_1aba19ef-f894-439c-93ea-77efcfca5838/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i[4497,4510] [2021-11-23 02:54:46,394 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_1aba19ef-f894-439c-93ea-77efcfca5838/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i[4557,4570] [2021-11-23 02:54:46,457 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 02:54:46,482 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,482 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,483 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,486 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,487 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,498 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,500 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,501 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,501 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,502 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,503 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,507 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,507 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,567 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:54:46,567 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:54:46,568 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:54:46,569 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:54:46,571 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:54:46,571 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:54:46,572 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:54:46,572 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:54:46,575 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:54:46,576 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:54:46,647 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,655 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:54:46,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:54:46,879 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:54:46,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:46 WrapperNode [2021-11-23 02:54:46,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:54:46,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:54:46,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:54:46,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:54:46,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:46" (1/1) ... [2021-11-23 02:54:46,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:46" (1/1) ... [2021-11-23 02:54:47,051 INFO L137 Inliner]: procedures = 691, calls = 1700, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 616 [2021-11-23 02:54:47,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:54:47,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:54:47,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:54:47,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:54:47,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:46" (1/1) ... [2021-11-23 02:54:47,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:46" (1/1) ... [2021-11-23 02:54:47,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:46" (1/1) ... [2021-11-23 02:54:47,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:46" (1/1) ... [2021-11-23 02:54:47,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:46" (1/1) ... [2021-11-23 02:54:47,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:46" (1/1) ... [2021-11-23 02:54:47,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:46" (1/1) ... [2021-11-23 02:54:47,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:54:47,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:54:47,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:54:47,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:54:47,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:46" (1/1) ... [2021-11-23 02:54:47,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:54:47,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:54:47,209 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:54:47,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:54:47,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:54:47,259 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-11-23 02:54:47,259 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-11-23 02:54:47,260 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-23 02:54:47,260 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-23 02:54:47,260 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-23 02:54:47,260 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-23 02:54:47,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:54:47,260 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-23 02:54:47,277 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-23 02:54:47,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 02:54:47,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 02:54:47,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:54:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:54:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:54:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:54:47,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:54:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-23 02:54:47,280 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-23 02:54:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-23 02:54:47,280 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-23 02:54:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-23 02:54:47,281 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-23 02:54:47,281 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2021-11-23 02:54:47,281 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2021-11-23 02:54:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:54:47,282 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:54:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_pop_back [2021-11-23 02:54:47,282 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_pop_back [2021-11-23 02:54:47,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:54:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:54:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:54:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-23 02:54:47,283 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-23 02:54:47,283 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-23 02:54:47,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-23 02:54:47,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:54:47,285 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-23 02:54:47,285 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-23 02:54:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-23 02:54:47,286 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-23 02:54:47,286 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-11-23 02:54:47,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-11-23 02:54:47,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:54:47,599 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:54:47,601 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:54:48,644 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:54:48,769 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:54:48,769 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:54:48,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:54:48 BoogieIcfgContainer [2021-11-23 02:54:48,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:54:48,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:54:48,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:54:48,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:54:48,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:54:44" (1/3) ... [2021-11-23 02:54:48,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124ac9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:54:48, skipping insertion in model container [2021-11-23 02:54:48,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:46" (2/3) ... [2021-11-23 02:54:48,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124ac9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:54:48, skipping insertion in model container [2021-11-23 02:54:48,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:54:48" (3/3) ... [2021-11-23 02:54:48,782 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_pop_back_harness.i [2021-11-23 02:54:48,787 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:54:48,788 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:54:48,836 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:54:48,842 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 [2021-11-23 02:54:48,843 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:54:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 77 states have internal predecessors, (90), 48 states have call successors, (48), 16 states have call predecessors, (48), 16 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-23 02:54:48,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 02:54:48,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:48,872 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:48,872 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:48,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:48,877 INFO L85 PathProgramCache]: Analyzing trace with hash 469076981, now seen corresponding path program 1 times [2021-11-23 02:54:48,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:48,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64035961] [2021-11-23 02:54:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:48,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:54:49,560 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:49,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64035961] [2021-11-23 02:54:49,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64035961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:54:49,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975576811] [2021-11-23 02:54:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:49,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:49,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:54:49,572 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:54:49,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:54:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:50,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 2094 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:54:50,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:54:50,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:54:50,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975576811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:50,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:54:50,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-23 02:54:50,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820781822] [2021-11-23 02:54:50,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:50,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:54:50,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:50,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:54:50,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:54:50,356 INFO L87 Difference]: Start difference. First operand has 142 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 77 states have internal predecessors, (90), 48 states have call successors, (48), 16 states have call predecessors, (48), 16 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:54:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:51,842 INFO L93 Difference]: Finished difference Result 255 states and 361 transitions. [2021-11-23 02:54:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:54:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 67 [2021-11-23 02:54:51,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:51,859 INFO L225 Difference]: With dead ends: 255 [2021-11-23 02:54:51,860 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 02:54:51,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:54:51,874 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 29 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:51,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 546 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 02:54:51,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 02:54:51,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-23 02:54:51,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 78 states have internal predecessors, (89), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (52), 47 states have call predecessors, (52), 47 states have call successors, (52) [2021-11-23 02:54:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 189 transitions. [2021-11-23 02:54:51,965 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 189 transitions. Word has length 67 [2021-11-23 02:54:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:51,966 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 189 transitions. [2021-11-23 02:54:51,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:54:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 189 transitions. [2021-11-23 02:54:51,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 02:54:51,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:51,974 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:52,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:52,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 02:54:52,188 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:52,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:52,189 INFO L85 PathProgramCache]: Analyzing trace with hash 941615624, now seen corresponding path program 1 times [2021-11-23 02:54:52,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:52,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675133350] [2021-11-23 02:54:52,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:52,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:52,286 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:54:52,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704303724] [2021-11-23 02:54:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:52,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:52,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:54:52,287 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:54:52,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:54:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:52,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 2204 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:54:52,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-23 02:54:52,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:54:52,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:52,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675133350] [2021-11-23 02:54:52,972 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:54:52,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704303724] [2021-11-23 02:54:52,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704303724] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:52,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:52,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 02:54:52,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89799016] [2021-11-23 02:54:52,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:52,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:54:52,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:52,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:54:52,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:54:52,976 INFO L87 Difference]: Start difference. First operand 142 states and 189 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-23 02:54:54,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:54,097 INFO L93 Difference]: Finished difference Result 244 states and 326 transitions. [2021-11-23 02:54:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:54:54,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 76 [2021-11-23 02:54:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:54,103 INFO L225 Difference]: With dead ends: 244 [2021-11-23 02:54:54,103 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 02:54:54,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:54:54,106 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 47 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:54,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 777 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 02:54:54,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 02:54:54,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-23 02:54:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 78 states have internal predecessors, (89), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (49), 47 states have call predecessors, (49), 47 states have call successors, (49) [2021-11-23 02:54:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2021-11-23 02:54:54,124 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 76 [2021-11-23 02:54:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:54,125 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2021-11-23 02:54:54,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-23 02:54:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2021-11-23 02:54:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 02:54:54,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:54,127 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:54,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:54,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:54,356 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:54,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:54,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1291655425, now seen corresponding path program 2 times [2021-11-23 02:54:54,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:54,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349864931] [2021-11-23 02:54:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:54,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:54,439 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:54:54,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575755144] [2021-11-23 02:54:54,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:54:54,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:54,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:54:54,455 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:54:54,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:54:54,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:54:54,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:54:54,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:54:54,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 02:54:55,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:54:55,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:55,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349864931] [2021-11-23 02:54:55,074 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:54:55,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575755144] [2021-11-23 02:54:55,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575755144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:55,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:55,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:54:55,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622380513] [2021-11-23 02:54:55,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:55,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:54:55,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:55,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:54:55,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:54:55,078 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand has 5 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:54:55,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:55,903 INFO L93 Difference]: Finished difference Result 242 states and 320 transitions. [2021-11-23 02:54:55,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:54:55,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 85 [2021-11-23 02:54:55,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:55,908 INFO L225 Difference]: With dead ends: 242 [2021-11-23 02:54:55,908 INFO L226 Difference]: Without dead ends: 142 [2021-11-23 02:54:55,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:54:55,910 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 0 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:55,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 608 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:54:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-23 02:54:55,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-11-23 02:54:55,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 78 states have internal predecessors, (89), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2021-11-23 02:54:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 185 transitions. [2021-11-23 02:54:55,926 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 185 transitions. Word has length 85 [2021-11-23 02:54:55,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:55,927 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 185 transitions. [2021-11-23 02:54:55,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:54:55,928 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 185 transitions. [2021-11-23 02:54:55,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 02:54:55,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:55,929 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:55,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:56,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 02:54:56,156 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:56,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2046961644, now seen corresponding path program 3 times [2021-11-23 02:54:56,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:56,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233437729] [2021-11-23 02:54:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:56,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:56,217 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:54:56,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920633321] [2021-11-23 02:54:56,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:54:56,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:56,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:54:56,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:54:56,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:54:56,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:54:56,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:54:56,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 2424 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:54:56,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 02:54:56,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:54:56,980 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:56,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233437729] [2021-11-23 02:54:56,980 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:54:56,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920633321] [2021-11-23 02:54:56,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920633321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:56,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:56,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 02:54:56,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406903030] [2021-11-23 02:54:56,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:56,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:54:56,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:56,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:54:56,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:54:56,983 INFO L87 Difference]: Start difference. First operand 142 states and 185 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-23 02:54:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:58,718 INFO L93 Difference]: Finished difference Result 241 states and 316 transitions. [2021-11-23 02:54:58,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:54:58,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 94 [2021-11-23 02:54:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:58,721 INFO L225 Difference]: With dead ends: 241 [2021-11-23 02:54:58,722 INFO L226 Difference]: Without dead ends: 140 [2021-11-23 02:54:58,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:54:58,724 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 51 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:58,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1033 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 02:54:58,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-23 02:54:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-23 02:54:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 75 states have (on average 1.16) internal successors, (87), 76 states have internal predecessors, (87), 48 states have call successors, (48), 16 states have call predecessors, (48), 16 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2021-11-23 02:54:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 182 transitions. [2021-11-23 02:54:58,767 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 182 transitions. Word has length 94 [2021-11-23 02:54:58,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:58,770 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 182 transitions. [2021-11-23 02:54:58,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-23 02:54:58,771 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 182 transitions. [2021-11-23 02:54:58,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-23 02:54:58,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:58,775 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:58,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:54:58,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:58,984 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:58,984 INFO L85 PathProgramCache]: Analyzing trace with hash 833723995, now seen corresponding path program 1 times [2021-11-23 02:54:58,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:58,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473570477] [2021-11-23 02:54:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:58,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:59,040 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:54:59,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159526659] [2021-11-23 02:54:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:59,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:54:59,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:54:59,042 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:54:59,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1aba19ef-f894-439c-93ea-77efcfca5838/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:54:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:59,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 303 conjunts are in the unsatisfiable core [2021-11-23 02:54:59,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:54:59,803 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:55:00,672 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 41 treesize of output 35 [2021-11-23 02:55:00,678 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 32 treesize of output 26 [2021-11-23 02:55:00,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:00,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:00,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:00,840 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 38 treesize of output 29 [2021-11-23 02:55:00,940 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 9 treesize of output 3 [2021-11-23 02:55:00,954 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 9 treesize of output 3 [2021-11-23 02:55:06,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:06,233 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-23 02:55:06,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 68 [2021-11-23 02:55:06,305 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-23 02:55:06,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 60 [2021-11-23 02:55:09,688 INFO L354 Elim1Store]: treesize reduction 162, result has 21.0 percent of original size [2021-11-23 02:55:09,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 80 [2021-11-23 02:55:24,759 INFO L354 Elim1Store]: treesize reduction 132, result has 21.9 percent of original size [2021-11-23 02:55:24,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 115 treesize of output 131 [2021-11-23 02:55:24,954 INFO L354 Elim1Store]: treesize reduction 254, result has 9.3 percent of original size [2021-11-23 02:55:24,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 120 treesize of output 126 [2021-11-23 02:55:36,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:36,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:36,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:36,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:55:36,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:55:36,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:55:36,577 INFO L354 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2021-11-23 02:55:36,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 134 treesize of output 156 [2021-11-23 02:55:36,709 INFO L354 Elim1Store]: treesize reduction 84, result has 30.6 percent of original size [2021-11-23 02:55:36,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 138 treesize of output 162 [2021-11-23 02:56:38,637 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 268 treesize of output 262 [2021-11-23 02:56:38,645 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 262 treesize of output 256 [2021-11-23 02:56:56,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:56:56,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 87 [2021-11-23 02:56:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 10 proven. 81 refuted. 1 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:56:56,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:10,812 WARN L227 SmtUtils]: Spent 13.62s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-23 02:57:17,537 WARN L227 SmtUtils]: Spent 6.72s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 268] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-23 02:57:36,105 WARN L227 SmtUtils]: Spent 18.53s on a formula simplification. DAG size of input: 330 DAG size of output: 140 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-23 02:57:41,599 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 268] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-23 02:57:41,892 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 436 treesize of output 430 [2021-11-23 02:57:41,906 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 430 treesize of output 424 [2021-11-23 02:58:28,371 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_aws_mul_size_checked_#in~r#1.base_7| Int)) (let ((.cse0 (let ((.cse1 (select |c_#memory_int| c_aws_array_list_length_~list.base))) (* (select .cse1 (+ c_aws_array_list_length_~list.offset 24)) (select .cse1 (+ 16 c_aws_array_list_length_~list.offset)))))) (<= (mod .cse0 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 .cse0)) c_aws_array_list_length_~list.base) (+ 8 c_aws_array_list_length_~list.offset)) 18446744073709551616)))) (forall ((|v_aws_mul_size_checked_#in~r#1.base_7| Int)) (let ((.cse5 (+ c_aws_array_list_length_~list.offset 24))) (let ((.cse3 (let ((.cse6 (select |c_#memory_int| c_aws_array_list_length_~list.base))) (* (select .cse6 .cse5) (select .cse6 (+ 16 c_aws_array_list_length_~list.offset)))))) (let ((.cse4 (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_aws_array_list_length_~list.base))) (let ((.cse2 (mod (select .cse4 (+ 8 c_aws_array_list_length_~list.offset)) 18446744073709551616))) (or (< .cse2 (mod .cse3 18446744073709551616)) (and (= 0 .cse2) (not (= (mod (select .cse4 .cse5) 18446744073709551616) 0)))))))))) is different from false [2021-11-23 02:58:28,402 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:58:28,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473570477] [2021-11-23 02:58:28,402 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:58:28,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159526659] [2021-11-23 02:58:28,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159526659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:58:28,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [319366138] [2021-11-23 02:58:28,432 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2021-11-23 02:58:28,432 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:58:28,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:58:28,454 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:58:28,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:58:31,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:31,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:31,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:31,980 INFO L244 Elim1Store]: Index analysis took 613 ms [2021-11-23 02:58:50,849 WARN L227 SmtUtils]: Spent 18.81s on a formula simplification. DAG size of input: 1749 DAG size of output: 1163 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:58:50,853 INFO L354 Elim1Store]: treesize reduction 1948, result has 47.2 percent of original size [2021-11-23 02:58:50,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 197 select indices, 197 select index equivalence classes, 19310 disjoint index pairs (out of 19306 index pairs), introduced 197 new quantified variables, introduced 194 case distinctions, treesize of input 992 treesize of output 2350 [2021-11-23 02:58:53,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:54,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:54,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:58:54,546 INFO L244 Elim1Store]: Index analysis took 1129 ms [2021-11-23 02:59:33,986 WARN L227 SmtUtils]: Spent 39.39s on a formula simplification. DAG size of input: 2139 DAG size of output: 1167 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 02:59:33,991 INFO L354 Elim1Store]: treesize reduction 3492, result has 33.3 percent of original size [2021-11-23 02:59:33,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 199 select indices, 199 select index equivalence classes, 19507 disjoint index pairs (out of 19701 index pairs), introduced 199 new quantified variables, introduced 388 case distinctions, treesize of input 1002 treesize of output 2369 [2021-11-23 02:59:35,612 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 192 [2021-11-23 02:59:35,729 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 192 [2021-11-23 02:59:35,913 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 192 [2021-11-23 02:59:36,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 02:59:36,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:36,361 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 55 treesize of output 54 [2021-11-23 02:59:36,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:36,367 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 51 treesize of output 50 [2021-11-23 02:59:36,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:36,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:36,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:36,382 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 38 treesize of output 29 [2021-11-23 02:59:36,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:36,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 145 [2021-11-23 02:59:36,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:36,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 145 [2021-11-23 02:59:36,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 02:59:36,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:59:36,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 22 [2021-11-23 02:59:36,676 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 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-23 02:59:36,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 02:59:36,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 02:59:36,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:59:36,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 02:59:36,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-11-23 02:59:36,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-11-23 02:59:36,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:36,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:59:36,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 38 [2021-11-23 02:59:36,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:36,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:59:36,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 38 [2021-11-23 02:59:36,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-11-23 02:59:36,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-11-23 02:59:37,050 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 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-23 02:59:37,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:37,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 02:59:37,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:37,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-11-23 02:59:37,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:37,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2021-11-23 02:59:37,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:37,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 02:59:38,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:38,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-11-23 02:59:38,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:38,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 24 [2021-11-23 02:59:41,947 INFO L354 Elim1Store]: treesize reduction 76, result has 44.9 percent of original size [2021-11-23 02:59:41,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 969 treesize of output 1018 [2021-11-23 03:00:38,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11