./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/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_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/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_d72264dd-e973-40f6-b8ad-8199b73712f0/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 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 01:55:20,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 01:55:20,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 01:55:21,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 01:55:21,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 01:55:21,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 01:55:21,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 01:55:21,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 01:55:21,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 01:55:21,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 01:55:21,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 01:55:21,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 01:55:21,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 01:55:21,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 01:55:21,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 01:55:21,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 01:55:21,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 01:55:21,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 01:55:21,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 01:55:21,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 01:55:21,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 01:55:21,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 01:55:21,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 01:55:21,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 01:55:21,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 01:55:21,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 01:55:21,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 01:55:21,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 01:55:21,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 01:55:21,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 01:55:21,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 01:55:21,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 01:55:21,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 01:55:21,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 01:55:21,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 01:55:21,110 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 01:55:21,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 01:55:21,111 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 01:55:21,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 01:55:21,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 01:55:21,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 01:55:21,114 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 01:55:21,165 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 01:55:21,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 01:55:21,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 01:55:21,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 01:55:21,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 01:55:21,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 01:55:21,168 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 01:55:21,168 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 01:55:21,169 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 01:55:21,169 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 01:55:21,170 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 01:55:21,170 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 01:55:21,171 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 01:55:21,171 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 01:55:21,171 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 01:55:21,171 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 01:55:21,172 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 01:55:21,172 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 01:55:21,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 01:55:21,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 01:55:21,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 01:55:21,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 01:55:21,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 01:55:21,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 01:55:21,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 01:55:21,174 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 01:55:21,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 01:55:21,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 01:55:21,176 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 01:55:21,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:55:21,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 01:55:21,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 01:55:21,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 01:55:21,178 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 01:55:21,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 01:55:21,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 01:55:21,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 01:55:21,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 01:55:21,179 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_d72264dd-e973-40f6-b8ad-8199b73712f0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d [2021-11-23 01:55:21,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 01:55:21,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 01:55:21,518 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 01:55:21,519 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 01:55:21,520 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 01:55:21,521 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2021-11-23 01:55:21,600 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/data/7f2c503b8/0183fbf4900d460c9c6c5e2580aa8473/FLAGf1ae9ce21 [2021-11-23 01:55:22,579 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 01:55:22,581 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2021-11-23 01:55:22,643 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/data/7f2c503b8/0183fbf4900d460c9c6c5e2580aa8473/FLAGf1ae9ce21 [2021-11-23 01:55:23,022 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/data/7f2c503b8/0183fbf4900d460c9c6c5e2580aa8473 [2021-11-23 01:55:23,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 01:55:23,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 01:55:23,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 01:55:23,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 01:55:23,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 01:55:23,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:55:23" (1/1) ... [2021-11-23 01:55:23,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33c559b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:23, skipping insertion in model container [2021-11-23 01:55:23,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:55:23" (1/1) ... [2021-11-23 01:55:23,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 01:55:23,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 01:55:23,533 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_d72264dd-e973-40f6-b8ad-8199b73712f0/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2021-11-23 01:55:23,542 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_d72264dd-e973-40f6-b8ad-8199b73712f0/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2021-11-23 01:55:24,632 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:24,638 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:24,641 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:24,643 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:24,645 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:24,674 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:24,675 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:24,677 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:24,678 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,043 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 01:55:25,045 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 01:55:25,046 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 01:55:25,048 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 01:55:25,049 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 01:55:25,050 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 01:55:25,051 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 01:55:25,052 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 01:55:25,053 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 01:55:25,054 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 01:55:25,230 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 01:55:25,239 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,240 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,394 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,407 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:55:25,594 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 01:55:25,621 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_d72264dd-e973-40f6-b8ad-8199b73712f0/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2021-11-23 01:55:25,622 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_d72264dd-e973-40f6-b8ad-8199b73712f0/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2021-11-23 01:55:25,674 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,675 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,675 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,676 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,676 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,691 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,691 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,693 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,694 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,756 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 01:55:25,757 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 01:55:25,758 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 01:55:25,758 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 01:55:25,759 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 01:55:25,760 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 01:55:25,760 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 01:55:25,761 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 01:55:25,762 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 01:55:25,762 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 01:55:25,797 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 01:55:25,815 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,815 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,875 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,875 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 01:55:25,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 01:55:26,257 INFO L208 MainTranslator]: Completed translation [2021-11-23 01:55:26,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:26 WrapperNode [2021-11-23 01:55:26,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 01:55:26,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 01:55:26,259 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 01:55:26,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 01:55:26,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:26" (1/1) ... [2021-11-23 01:55:26,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:26" (1/1) ... [2021-11-23 01:55:26,525 INFO L137 Inliner]: procedures = 692, calls = 2500, calls flagged for inlining = 57, calls inlined = 12, statements flattened = 1003 [2021-11-23 01:55:26,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 01:55:26,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 01:55:26,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 01:55:26,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 01:55:26,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:26" (1/1) ... [2021-11-23 01:55:26,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:26" (1/1) ... [2021-11-23 01:55:26,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:26" (1/1) ... [2021-11-23 01:55:26,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:26" (1/1) ... [2021-11-23 01:55:26,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:26" (1/1) ... [2021-11-23 01:55:26,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:26" (1/1) ... [2021-11-23 01:55:26,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:26" (1/1) ... [2021-11-23 01:55:26,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 01:55:26,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 01:55:26,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 01:55:26,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 01:55:26,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:26" (1/1) ... [2021-11-23 01:55:26,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 01:55:26,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:55:26,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 01:55:26,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 01:55:26,753 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-23 01:55:26,753 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-23 01:55:26,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 01:55:26,754 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-23 01:55:26,755 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-23 01:55:26,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 01:55:26,755 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-23 01:55:26,755 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-23 01:55:26,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 01:55:26,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 01:55:26,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 01:55:26,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 01:55:26,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 01:55:26,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 01:55:26,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 01:55:26,757 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-23 01:55:26,758 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-23 01:55:26,758 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2021-11-23 01:55:26,758 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2021-11-23 01:55:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-23 01:55:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-23 01:55:26,759 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 01:55:26,759 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 01:55:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 01:55:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-23 01:55:26,760 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-23 01:55:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 01:55:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 01:55:26,760 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-23 01:55:26,761 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-23 01:55:26,761 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-23 01:55:26,761 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-23 01:55:26,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 01:55:26,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 01:55:27,109 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 01:55:27,112 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 01:55:28,615 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 01:55:28,794 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 01:55:28,794 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-23 01:55:28,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:55:28 BoogieIcfgContainer [2021-11-23 01:55:28,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 01:55:28,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 01:55:28,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 01:55:28,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 01:55:28,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:55:23" (1/3) ... [2021-11-23 01:55:28,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a79b2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:55:28, skipping insertion in model container [2021-11-23 01:55:28,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:55:26" (2/3) ... [2021-11-23 01:55:28,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a79b2bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:55:28, skipping insertion in model container [2021-11-23 01:55:28,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:55:28" (3/3) ... [2021-11-23 01:55:28,810 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_relative_harness.i [2021-11-23 01:55:28,818 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 01:55:28,818 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 01:55:28,883 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 01:55:28,898 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 01:55:28,901 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 01:55:28,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 72 states have internal predecessors, (95), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-23 01:55:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 01:55:28,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:55:28,935 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:55:28,936 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:55:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:55:28,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1580795549, now seen corresponding path program 1 times [2021-11-23 01:55:28,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:55:28,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009464703] [2021-11-23 01:55:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:55:28,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:55:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:55:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:55:29,664 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:55:29,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009464703] [2021-11-23 01:55:29,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009464703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:55:29,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:55:29,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:55:29,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759590984] [2021-11-23 01:55:29,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:55:29,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:55:29,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:55:29,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:55:29,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:55:29,713 INFO L87 Difference]: Start difference. First operand has 122 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 72 states have internal predecessors, (95), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:55:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:55:31,153 INFO L93 Difference]: Finished difference Result 235 states and 337 transitions. [2021-11-23 01:55:31,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:55:31,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 33 [2021-11-23 01:55:31,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:55:31,166 INFO L225 Difference]: With dead ends: 235 [2021-11-23 01:55:31,179 INFO L226 Difference]: Without dead ends: 124 [2021-11-23 01:55:31,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:55:31,187 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 5 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 01:55:31,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 715 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 01:55:31,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-23 01:55:31,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2021-11-23 01:55:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 73 states have internal predecessors, (87), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-23 01:55:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 162 transitions. [2021-11-23 01:55:31,288 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 162 transitions. Word has length 33 [2021-11-23 01:55:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:55:31,289 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 162 transitions. [2021-11-23 01:55:31,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-23 01:55:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 162 transitions. [2021-11-23 01:55:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 01:55:31,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:55:31,292 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:55:31,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 01:55:31,293 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:55:31,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:55:31,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1848825383, now seen corresponding path program 1 times [2021-11-23 01:55:31,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:55:31,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743068135] [2021-11-23 01:55:31,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:55:31,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:55:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:55:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 01:55:34,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:55:34,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743068135] [2021-11-23 01:55:34,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743068135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:55:34,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761811723] [2021-11-23 01:55:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:55:34,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:55:34,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:55:34,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:55:34,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 01:55:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:55:35,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 2405 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-23 01:55:35,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:55:35,508 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 18 treesize of output 14 [2021-11-23 01:55:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 01:55:43,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 01:55:43,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761811723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:55:43,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 01:55:43,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [11] total 23 [2021-11-23 01:55:43,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110682795] [2021-11-23 01:55:43,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:55:43,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 01:55:43,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:55:43,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 01:55:43,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-11-23 01:55:43,307 INFO L87 Difference]: Start difference. First operand 122 states and 162 transitions. Second operand has 16 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-23 01:55:45,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:55:45,563 INFO L93 Difference]: Finished difference Result 150 states and 191 transitions. [2021-11-23 01:55:45,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 01:55:45,564 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 36 [2021-11-23 01:55:45,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:55:45,568 INFO L225 Difference]: With dead ends: 150 [2021-11-23 01:55:45,568 INFO L226 Difference]: Without dead ends: 134 [2021-11-23 01:55:45,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-11-23 01:55:45,571 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 34 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 01:55:45,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1585 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 233 Invalid, 0 Unknown, 270 Unchecked, 2.2s Time] [2021-11-23 01:55:45,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-23 01:55:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2021-11-23 01:55:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 74 states have internal predecessors, (87), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-23 01:55:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2021-11-23 01:55:45,596 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 36 [2021-11-23 01:55:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:55:45,596 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2021-11-23 01:55:45,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-23 01:55:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2021-11-23 01:55:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 01:55:45,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:55:45,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:55:45,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 01:55:45,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-23 01:55:45,820 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:55:45,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:55:45,820 INFO L85 PathProgramCache]: Analyzing trace with hash -971205567, now seen corresponding path program 1 times [2021-11-23 01:55:45,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:55:45,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943030988] [2021-11-23 01:55:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:55:45,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:55:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:55:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 01:55:46,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:55:46,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943030988] [2021-11-23 01:55:46,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943030988] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:55:46,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:55:46,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 01:55:46,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584005095] [2021-11-23 01:55:46,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:55:46,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 01:55:46,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:55:46,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 01:55:46,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 01:55:46,048 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 01:55:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:55:47,495 INFO L93 Difference]: Finished difference Result 146 states and 185 transitions. [2021-11-23 01:55:47,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 01:55:47,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 38 [2021-11-23 01:55:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:55:47,498 INFO L225 Difference]: With dead ends: 146 [2021-11-23 01:55:47,498 INFO L226 Difference]: Without dead ends: 128 [2021-11-23 01:55:47,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 01:55:47,501 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 3 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 01:55:47,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 688 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 01:55:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-23 01:55:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2021-11-23 01:55:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 74 states have internal predecessors, (87), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-23 01:55:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2021-11-23 01:55:47,519 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 38 [2021-11-23 01:55:47,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:55:47,520 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2021-11-23 01:55:47,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 01:55:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2021-11-23 01:55:47,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 01:55:47,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:55:47,523 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:55:47,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 01:55:47,523 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:55:47,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:55:47,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1272715639, now seen corresponding path program 1 times [2021-11-23 01:55:47,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:55:47,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48309654] [2021-11-23 01:55:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:55:47,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:55:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:55:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 01:55:48,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:55:48,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48309654] [2021-11-23 01:55:48,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48309654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 01:55:48,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 01:55:48,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 01:55:48,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311665517] [2021-11-23 01:55:48,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 01:55:48,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 01:55:48,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 01:55:48,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 01:55:48,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-23 01:55:48,409 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 01:55:49,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 01:55:49,524 INFO L93 Difference]: Finished difference Result 235 states and 306 transitions. [2021-11-23 01:55:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 01:55:49,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 41 [2021-11-23 01:55:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 01:55:49,527 INFO L225 Difference]: With dead ends: 235 [2021-11-23 01:55:49,528 INFO L226 Difference]: Without dead ends: 124 [2021-11-23 01:55:49,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 01:55:49,531 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 58 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 01:55:49,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 632 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 01:55:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-23 01:55:49,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-23 01:55:49,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 73 states have (on average 1.178082191780822) internal successors, (86), 74 states have internal predecessors, (86), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-23 01:55:49,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 159 transitions. [2021-11-23 01:55:49,550 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 159 transitions. Word has length 41 [2021-11-23 01:55:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 01:55:49,551 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 159 transitions. [2021-11-23 01:55:49,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-23 01:55:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 159 transitions. [2021-11-23 01:55:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 01:55:49,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 01:55:49,553 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 01:55:49,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 01:55:49,554 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 01:55:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 01:55:49,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1020634721, now seen corresponding path program 1 times [2021-11-23 01:55:49,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 01:55:49,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416463241] [2021-11-23 01:55:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:55:49,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 01:55:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:55:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 01:55:51,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 01:55:51,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416463241] [2021-11-23 01:55:51,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416463241] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 01:55:51,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777928541] [2021-11-23 01:55:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 01:55:51,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 01:55:51,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 01:55:51,964 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 01:55:51,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d72264dd-e973-40f6-b8ad-8199b73712f0/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 01:55:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 01:55:52,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 2433 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-23 01:55:52,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 01:55:52,639 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 18 treesize of output 14 [2021-11-23 01:56:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 01:56:02,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 01:56:05,617 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2021-11-23 02:01:59,215 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.