./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta --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 bc5ed5fb850d9a2c9d9a14514ffc7939afe81a277edfb59aefd3c5f66024eda8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:38:42,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:38:42,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:38:42,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:38:42,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:38:42,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:38:42,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:38:42,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:38:42,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:38:42,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:38:42,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:38:42,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:38:42,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:38:42,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:38:42,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:38:42,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:38:42,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:38:42,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:38:42,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:38:42,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:38:42,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:38:42,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:38:42,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:38:42,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:38:42,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:38:42,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:38:42,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:38:42,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:38:42,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:38:42,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:38:42,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:38:42,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:38:42,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:38:42,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:38:42,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:38:42,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:38:42,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:38:42,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:38:42,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:38:42,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:38:42,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:38:42,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:38:42,314 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:38:42,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:38:42,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:38:42,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:38:42,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:38:42,317 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:38:42,317 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:38:42,318 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:38:42,318 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:38:42,318 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:38:42,320 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:38:42,320 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:38:42,320 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:38:42,321 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:38:42,321 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:38:42,321 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:38:42,322 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:38:42,322 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:38:42,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:38:42,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:38:42,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:38:42,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:38:42,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:38:42,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:38:42,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:38:42,327 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:38:42,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:38:42,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:38:42,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:38:42,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:42,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:38:42,329 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:38:42,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:38:42,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:38:42,330 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:38:42,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:38:42,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:38:42,331 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:38:42,331 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc5ed5fb850d9a2c9d9a14514ffc7939afe81a277edfb59aefd3c5f66024eda8 [2022-10-17 17:38:42,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:38:42,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:38:42,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:38:42,692 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:38:42,693 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:38:42,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i [2022-10-17 17:38:42,775 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/data/73f20f969/04736d121a3249508216c582532a4fb0/FLAG39c7307d4 [2022-10-17 17:38:43,781 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:38:43,782 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i [2022-10-17 17:38:43,835 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/data/73f20f969/04736d121a3249508216c582532a4fb0/FLAG39c7307d4 [2022-10-17 17:38:44,194 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/data/73f20f969/04736d121a3249508216c582532a4fb0 [2022-10-17 17:38:44,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:38:44,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:38:44,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:44,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:38:44,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:38:44,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:44" (1/1) ... [2022-10-17 17:38:44,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23ea10e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:44, skipping insertion in model container [2022-10-17 17:38:44,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:44" (1/1) ... [2022-10-17 17:38:44,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:38:44,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:38:44,733 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_c7a97e15-387e-4362-b0fb-9387a6010110/sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i[4499,4512] [2022-10-17 17:38:44,743 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_c7a97e15-387e-4362-b0fb-9387a6010110/sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i[4559,4572] [2022-10-17 17:38:45,865 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:45,876 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:45,877 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:45,878 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:45,880 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:45,909 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:45,912 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:45,915 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:45,916 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:46,455 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:38:46,457 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:38:46,459 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:38:46,460 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:38:46,463 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:38:46,464 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:38:46,465 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:38:46,466 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:38:46,467 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:38:46,468 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:38:46,765 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:38:46,970 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:46,972 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:47,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:47,212 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:38:47,228 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_c7a97e15-387e-4362-b0fb-9387a6010110/sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i[4499,4512] [2022-10-17 17:38:47,228 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_c7a97e15-387e-4362-b0fb-9387a6010110/sv-benchmarks/c/aws-c-common/aws_string_destroy_secure_harness.i[4559,4572] [2022-10-17 17:38:47,301 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:47,301 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:47,302 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:47,302 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:47,303 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:47,313 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:47,313 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:47,314 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:47,315 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:47,365 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:38:47,366 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:38:47,367 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:38:47,367 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:38:47,368 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:38:47,369 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:38:47,369 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:38:47,370 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:38:47,370 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:38:47,371 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:38:47,397 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:38:47,486 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:47,487 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:38:47,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:47,899 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:38:47,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:47 WrapperNode [2022-10-17 17:38:47,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:47,901 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:47,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:38:47,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:38:47,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:47" (1/1) ... [2022-10-17 17:38:48,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:47" (1/1) ... [2022-10-17 17:38:48,261 INFO L138 Inliner]: procedures = 693, calls = 2772, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 812 [2022-10-17 17:38:48,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:48,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:38:48,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:38:48,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:38:48,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:47" (1/1) ... [2022-10-17 17:38:48,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:47" (1/1) ... [2022-10-17 17:38:48,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:47" (1/1) ... [2022-10-17 17:38:48,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:47" (1/1) ... [2022-10-17 17:38:48,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:47" (1/1) ... [2022-10-17 17:38:48,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:47" (1/1) ... [2022-10-17 17:38:48,365 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:47" (1/1) ... [2022-10-17 17:38:48,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:47" (1/1) ... [2022-10-17 17:38:48,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:38:48,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:38:48,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:38:48,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:38:48,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:47" (1/1) ... [2022-10-17 17:38:48,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:48,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:48,429 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:38:48,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:38:48,495 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2022-10-17 17:38:48,495 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2022-10-17 17:38:48,496 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2022-10-17 17:38:48,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2022-10-17 17:38:48,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:38:48,497 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-10-17 17:38:48,497 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-10-17 17:38:48,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:38:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 17:38:48,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 17:38:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:38:48,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:38:48,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:38:48,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:38:48,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:38:48,500 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-10-17 17:38:48,500 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-10-17 17:38:48,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-17 17:38:48,500 INFO L130 BoogieDeclarations]: Found specification of procedure aws_secure_zero [2022-10-17 17:38:48,500 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_secure_zero [2022-10-17 17:38:48,501 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-10-17 17:38:48,502 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-10-17 17:38:48,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-10-17 17:38:48,502 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-10-17 17:38:48,502 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_bytes [2022-10-17 17:38:48,503 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_bytes [2022-10-17 17:38:48,503 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:38:48,503 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:38:48,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:38:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:38:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-10-17 17:38:48,504 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-10-17 17:38:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-10-17 17:38:48,504 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-10-17 17:38:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:38:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:38:49,003 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:38:49,007 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:38:50,730 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:38:50,927 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:38:50,927 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 17:38:50,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:50 BoogieIcfgContainer [2022-10-17 17:38:50,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:38:50,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:38:50,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:38:50,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:38:50,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:38:44" (1/3) ... [2022-10-17 17:38:50,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499e5494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:50, skipping insertion in model container [2022-10-17 17:38:50,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:47" (2/3) ... [2022-10-17 17:38:50,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499e5494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:50, skipping insertion in model container [2022-10-17 17:38:50,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:50" (3/3) ... [2022-10-17 17:38:50,945 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_destroy_secure_harness.i [2022-10-17 17:38:50,965 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:38:50,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:38:51,047 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:38:51,054 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b05b56e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:38:51,055 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:38:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 20 states have call successors, (20), 12 states have call predecessors, (20), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-10-17 17:38:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 17:38:51,071 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:51,072 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:51,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:51,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:51,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1641655029, now seen corresponding path program 1 times [2022-10-17 17:38:51,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:51,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050325772] [2022-10-17 17:38:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:51,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 17:38:53,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:53,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050325772] [2022-10-17 17:38:53,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050325772] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:53,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:53,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 17:38:53,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733506774] [2022-10-17 17:38:53,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:53,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:38:53,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:53,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:38:53,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:38:53,150 INFO L87 Difference]: Start difference. First operand has 79 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 20 states have call successors, (20), 12 states have call predecessors, (20), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2022-10-17 17:38:53,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:53,614 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2022-10-17 17:38:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:38:53,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2022-10-17 17:38:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:53,632 INFO L225 Difference]: With dead ends: 103 [2022-10-17 17:38:53,632 INFO L226 Difference]: Without dead ends: 73 [2022-10-17 17:38:53,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-10-17 17:38:53,646 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 24 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:53,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 500 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:38:53,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-17 17:38:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-10-17 17:38:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-10-17 17:38:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2022-10-17 17:38:53,724 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 47 [2022-10-17 17:38:53,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:53,726 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2022-10-17 17:38:53,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2022-10-17 17:38:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2022-10-17 17:38:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-17 17:38:53,737 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:53,737 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:53,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:38:53,738 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:53,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:53,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2033896927, now seen corresponding path program 1 times [2022-10-17 17:38:53,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:53,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803719970] [2022-10-17 17:38:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:53,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 17:38:54,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:54,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803719970] [2022-10-17 17:38:54,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803719970] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:54,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:54,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:38:54,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847913726] [2022-10-17 17:38:54,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:54,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:38:54,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:54,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:38:54,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:38:54,481 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-10-17 17:38:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:54,650 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2022-10-17 17:38:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:38:54,651 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 68 [2022-10-17 17:38:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:54,654 INFO L225 Difference]: With dead ends: 119 [2022-10-17 17:38:54,654 INFO L226 Difference]: Without dead ends: 73 [2022-10-17 17:38:54,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:38:54,658 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 3 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:54,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 189 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:38:54,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-17 17:38:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-10-17 17:38:54,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-10-17 17:38:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-10-17 17:38:54,693 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 68 [2022-10-17 17:38:54,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:54,694 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-10-17 17:38:54,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-10-17 17:38:54,695 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-10-17 17:38:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-10-17 17:38:54,699 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:54,699 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:54,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:38:54,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:54,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:54,711 INFO L85 PathProgramCache]: Analyzing trace with hash 606595662, now seen corresponding path program 1 times [2022-10-17 17:38:54,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:54,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461451] [2022-10-17 17:38:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:54,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-10-17 17:38:57,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:57,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461451] [2022-10-17 17:38:57,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461451] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:57,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547858517] [2022-10-17 17:38:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:57,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:57,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:57,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:57,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:38:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:58,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 2650 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-17 17:38:58,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:59,420 INFO L356 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2022-10-17 17:38:59,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2022-10-17 17:38:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-17 17:38:59,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:59,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547858517] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:59,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:38:59,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [10] total 23 [2022-10-17 17:38:59,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883441464] [2022-10-17 17:38:59,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:59,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 17:38:59,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:59,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 17:38:59,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2022-10-17 17:38:59,881 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 15 states, 10 states have (on average 3.7) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2022-10-17 17:39:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:00,530 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2022-10-17 17:39:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 17:39:00,531 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 3.7) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) Word has length 72 [2022-10-17 17:39:00,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:00,534 INFO L225 Difference]: With dead ends: 97 [2022-10-17 17:39:00,534 INFO L226 Difference]: Without dead ends: 74 [2022-10-17 17:39:00,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-10-17 17:39:00,536 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 9 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:00,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 807 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 260 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-10-17 17:39:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-10-17 17:39:00,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-10-17 17:39:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-10-17 17:39:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2022-10-17 17:39:00,549 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 72 [2022-10-17 17:39:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:00,550 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2022-10-17 17:39:00,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 3.7) internal successors, (37), 13 states have internal predecessors, (37), 6 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2022-10-17 17:39:00,551 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2022-10-17 17:39:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-10-17 17:39:00,552 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:00,553 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:00,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:39:00,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:00,776 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:00,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash -937435978, now seen corresponding path program 1 times [2022-10-17 17:39:00,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:00,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445985239] [2022-10-17 17:39:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:00,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-17 17:39:03,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:03,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445985239] [2022-10-17 17:39:03,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445985239] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:39:03,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659998164] [2022-10-17 17:39:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:03,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:03,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:03,320 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:03,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7a97e15-387e-4362-b0fb-9387a6010110/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:39:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:04,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 2669 conjuncts, 195 conjunts are in the unsatisfiable core [2022-10-17 17:39:04,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:39:04,595 INFO L390 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 65 treesize of output 60 [2022-10-17 17:39:04,635 INFO L356 Elim1Store]: treesize reduction 15, result has 53.1 percent of original size [2022-10-17 17:39:04,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 124 [2022-10-17 17:39:04,752 INFO L356 Elim1Store]: treesize reduction 104, result has 1.0 percent of original size [2022-10-17 17:39:04,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 91 [2022-10-17 17:39:10,116 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-10-17 17:39:10,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 26 [2022-10-17 17:39:10,360 INFO L390 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 14 treesize of output 10