./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_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_a1f98581-b5dd-4b95-a2a6-b1dacd124914/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1f98581-b5dd-4b95-a2a6-b1dacd124914/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_a1f98581-b5dd-4b95-a2a6-b1dacd124914/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1f98581-b5dd-4b95-a2a6-b1dacd124914/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1f98581-b5dd-4b95-a2a6-b1dacd124914/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_a1f98581-b5dd-4b95-a2a6-b1dacd124914/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 c2c8100e1f648cee1922c84a2421989bafb670d4445ddc160c17e3cd878eaa49 --- 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 17:39:21,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:39:21,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:39:21,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:39:21,601 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:39:21,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:39:21,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:39:21,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:39:21,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:39:21,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:39:21,611 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:39:21,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:39:21,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:39:21,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:39:21,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:39:21,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:39:21,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:39:21,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:39:21,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:39:21,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:39:21,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:39:21,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:39:21,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:39:21,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:39:21,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:39:21,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:39:21,639 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:39:21,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:39:21,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:39:21,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:39:21,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:39:21,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:39:21,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:39:21,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:39:21,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:39:21,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:39:21,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:39:21,649 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:39:21,649 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:39:21,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:39:21,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:39:21,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1f98581-b5dd-4b95-a2a6-b1dacd124914/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:39:21,681 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:39:21,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:39:21,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:39:21,682 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:39:21,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:39:21,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:39:21,683 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:39:21,683 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:39:21,683 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:39:21,683 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:39:21,684 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:39:21,684 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:39:21,684 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:39:21,684 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:39:21,684 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:39:21,685 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:39:21,685 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:39:21,685 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:39:21,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:39:21,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:39:21,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:39:21,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:39:21,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:39:21,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:39:21,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:39:21,687 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:39:21,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:39:21,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:39:21,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:39:21,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:39:21,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:39:21,688 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:39:21,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:39:21,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:39:21,689 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:39:21,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:39:21,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:39:21,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:39:21,690 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_a1f98581-b5dd-4b95-a2a6-b1dacd124914/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1f98581-b5dd-4b95-a2a6-b1dacd124914/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2c8100e1f648cee1922c84a2421989bafb670d4445ddc160c17e3cd878eaa49 [2022-10-17 17:39:21,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:39:21,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:39:21,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:39:21,987 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:39:21,988 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:39:21,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1f98581-b5dd-4b95-a2a6-b1dacd124914/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_harness.i [2022-10-17 17:39:22,063 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1f98581-b5dd-4b95-a2a6-b1dacd124914/bin/utaipan-G1rejxKTta/data/778c3b188/c77812c0daad4b41a774b908f6367523/FLAG9482ca1b0 [2022-10-17 17:39:22,950 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:39:22,951 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1f98581-b5dd-4b95-a2a6-b1dacd124914/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_harness.i [2022-10-17 17:39:22,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1f98581-b5dd-4b95-a2a6-b1dacd124914/bin/utaipan-G1rejxKTta/data/778c3b188/c77812c0daad4b41a774b908f6367523/FLAG9482ca1b0 [2022-10-17 17:39:23,431 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1f98581-b5dd-4b95-a2a6-b1dacd124914/bin/utaipan-G1rejxKTta/data/778c3b188/c77812c0daad4b41a774b908f6367523 [2022-10-17 17:39:23,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:39:23,436 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:39:23,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:39:23,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:39:23,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:39:23,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:39:23" (1/1) ... [2022-10-17 17:39:23,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6996e702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:23, skipping insertion in model container [2022-10-17 17:39:23,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:39:23" (1/1) ... [2022-10-17 17:39:23,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:39:23,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:39:23,855 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_a1f98581-b5dd-4b95-a2a6-b1dacd124914/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_harness.i[4495,4508] [2022-10-17 17:39:23,864 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_a1f98581-b5dd-4b95-a2a6-b1dacd124914/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_harness.i[4555,4568] [2022-10-17 17:39:24,929 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:24,936 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:24,936 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:24,944 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:24,945 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:24,956 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:24,958 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:24,961 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:24,962 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:25,421 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:39:25,422 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:39:25,423 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:39:25,426 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:39:25,428 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:39:25,430 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:39:25,431 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:39:25,432 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:39:25,433 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:39:25,433 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:39:25,602 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:39:25,757 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:25,757 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:25,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:39:25,922 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:39:25,950 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_a1f98581-b5dd-4b95-a2a6-b1dacd124914/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_harness.i[4495,4508] [2022-10-17 17:39:25,951 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_a1f98581-b5dd-4b95-a2a6-b1dacd124914/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_harness.i[4555,4568] [2022-10-17 17:39:26,015 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:26,017 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:26,018 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:26,019 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:26,020 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:26,030 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:26,031 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:26,032 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:26,033 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:26,088 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-10-17 17:39:26,089 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-10-17 17:39:26,090 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-10-17 17:39:26,091 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-10-17 17:39:26,092 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-10-17 17:39:26,093 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-10-17 17:39:26,093 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-10-17 17:39:26,094 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-10-17 17:39:26,095 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-10-17 17:39:26,096 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-10-17 17:39:26,131 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-10-17 17:39:26,194 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:26,194 WARN L1550 CHandler]: Possible shadowing of function index [2022-10-17 17:39:26,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:39:26,570 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:39:26,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:26 WrapperNode [2022-10-17 17:39:26,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:39:26,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:39:26,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:39:26,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:39:26,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:26" (1/1) ... [2022-10-17 17:39:26,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:26" (1/1) ... [2022-10-17 17:39:26,798 INFO L138 Inliner]: procedures = 691, calls = 2502, calls flagged for inlining = 53, calls inlined = 4, statements flattened = 753 [2022-10-17 17:39:26,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:39:26,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:39:26,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:39:26,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:39:26,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:26" (1/1) ... [2022-10-17 17:39:26,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:26" (1/1) ... [2022-10-17 17:39:26,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:26" (1/1) ... [2022-10-17 17:39:26,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:26" (1/1) ... [2022-10-17 17:39:26,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:26" (1/1) ... [2022-10-17 17:39:26,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:26" (1/1) ... [2022-10-17 17:39:26,893 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:26" (1/1) ... [2022-10-17 17:39:26,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:26" (1/1) ... [2022-10-17 17:39:26,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:39:26,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:39:26,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:39:26,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:39:26,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:26" (1/1) ... [2022-10-17 17:39:26,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:39:26,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1f98581-b5dd-4b95-a2a6-b1dacd124914/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:26,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1f98581-b5dd-4b95-a2a6-b1dacd124914/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:39:26,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1f98581-b5dd-4b95-a2a6-b1dacd124914/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:39:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_clean_up [2022-10-17 17:39:27,022 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_clean_up [2022-10-17 17:39:27,023 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-10-17 17:39:27,024 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-10-17 17:39:27,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:39:27,024 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-10-17 17:39:27,025 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-10-17 17:39:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:39:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 17:39:27,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 17:39:27,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:39:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:39:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:39:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:39:27,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:39:27,027 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-10-17 17:39:27,027 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-10-17 17:39:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2022-10-17 17:39:27,028 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2022-10-17 17:39:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:39:27,028 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:39:27,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:39:27,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:39:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:39:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-10-17 17:39:27,030 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-10-17 17:39:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:39:27,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:39:27,332 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:39:27,334 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:39:28,769 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:39:29,057 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:39:29,058 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 17:39:29,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:39:29 BoogieIcfgContainer [2022-10-17 17:39:29,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:39:29,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:39:29,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:39:29,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:39:29,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:39:23" (1/3) ... [2022-10-17 17:39:29,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5063221f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:39:29, skipping insertion in model container [2022-10-17 17:39:29,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:39:26" (2/3) ... [2022-10-17 17:39:29,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5063221f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:39:29, skipping insertion in model container [2022-10-17 17:39:29,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:39:29" (3/3) ... [2022-10-17 17:39:29,078 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_clean_up_harness.i [2022-10-17 17:39:29,101 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:39:29,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:39:29,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:39:29,189 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;@907416e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:39:29,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:39:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-10-17 17:39:29,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-17 17:39:29,203 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:29,206 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:29,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:29,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1295164685, now seen corresponding path program 1 times [2022-10-17 17:39:29,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:29,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177401170] [2022-10-17 17:39:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:29,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:39:38,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:38,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177401170] [2022-10-17 17:39:38,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177401170] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:38,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:38,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-10-17 17:39:38,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492505117] [2022-10-17 17:39:38,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:38,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 17:39:38,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:38,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 17:39:38,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:39:38,624 INFO L87 Difference]: Start difference. First operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-10-17 17:39:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:41,617 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2022-10-17 17:39:41,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 17:39:41,620 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 38 [2022-10-17 17:39:41,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:41,629 INFO L225 Difference]: With dead ends: 89 [2022-10-17 17:39:41,630 INFO L226 Difference]: Without dead ends: 72 [2022-10-17 17:39:41,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:39:41,637 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 48 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:41,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 117 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-10-17 17:39:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-10-17 17:39:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2022-10-17 17:39:41,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 37 states have internal predecessors, (38), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-10-17 17:39:41,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-10-17 17:39:41,689 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 38 [2022-10-17 17:39:41,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:41,690 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-10-17 17:39:41,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-10-17 17:39:41,690 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-10-17 17:39:41,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 17:39:41,693 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:41,693 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:41,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:39:41,694 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:41,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:41,694 INFO L85 PathProgramCache]: Analyzing trace with hash -596338638, now seen corresponding path program 1 times [2022-10-17 17:39:41,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:41,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000417379] [2022-10-17 17:39:41,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:41,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:39:44,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:44,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000417379] [2022-10-17 17:39:44,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000417379] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:44,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:44,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 17:39:44,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333211948] [2022-10-17 17:39:44,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:44,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:39:44,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:44,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:39:44,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:39:44,870 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:39:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:46,560 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-10-17 17:39:46,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:39:46,560 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 42 [2022-10-17 17:39:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:46,565 INFO L225 Difference]: With dead ends: 72 [2022-10-17 17:39:46,565 INFO L226 Difference]: Without dead ends: 70 [2022-10-17 17:39:46,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:39:46,567 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:46,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 249 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-10-17 17:39:46,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-10-17 17:39:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2022-10-17 17:39:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-10-17 17:39:46,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-10-17 17:39:46,600 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 42 [2022-10-17 17:39:46,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:46,601 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-10-17 17:39:46,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:39:46,602 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-10-17 17:39:46,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 17:39:46,604 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:46,604 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-10-17 17:39:46,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:39:46,604 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:46,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:46,605 INFO L85 PathProgramCache]: Analyzing trace with hash -140008780, now seen corresponding path program 1 times [2022-10-17 17:39:46,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:46,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019311602] [2022-10-17 17:39:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:46,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:39:49,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:49,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019311602] [2022-10-17 17:39:49,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019311602] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:39:49,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:39:49,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 17:39:49,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493294842] [2022-10-17 17:39:49,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:39:49,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:39:49,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:49,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:39:49,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-10-17 17:39:49,704 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-10-17 17:39:51,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:51,390 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2022-10-17 17:39:51,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:39:51,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 44 [2022-10-17 17:39:51,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:51,393 INFO L225 Difference]: With dead ends: 63 [2022-10-17 17:39:51,393 INFO L226 Difference]: Without dead ends: 61 [2022-10-17 17:39:51,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:39:51,395 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 15 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:51,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 264 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-10-17 17:39:51,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-10-17 17:39:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-10-17 17:39:51,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-10-17 17:39:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2022-10-17 17:39:51,413 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 44 [2022-10-17 17:39:51,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:51,414 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2022-10-17 17:39:51,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-10-17 17:39:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2022-10-17 17:39:51,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-17 17:39:51,418 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:51,418 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:51,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:39:51,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:51,422 INFO L85 PathProgramCache]: Analyzing trace with hash 157437977, now seen corresponding path program 1 times [2022-10-17 17:39:51,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:51,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449176178] [2022-10-17 17:39:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:51,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat