./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS --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 2fd96106837ff3ee9325c248fea6969b94a5a1f2cee078fd159398f70369aafc --- 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-8393723 [2022-11-19 07:49:08,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:49:08,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:49:08,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:49:08,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:49:08,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:49:08,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:49:08,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:49:08,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:49:08,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:49:08,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:49:08,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:49:08,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:49:08,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:49:08,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:49:08,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:49:08,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:49:08,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:49:08,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:49:08,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:49:08,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:49:08,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:49:08,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:49:08,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:49:08,599 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:49:08,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:49:08,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:49:08,606 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:49:08,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:49:08,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:49:08,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:49:08,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:49:08,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:49:08,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:49:08,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:49:08,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:49:08,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:49:08,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:49:08,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:49:08,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:49:08,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:49:08,623 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:49:08,671 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:49:08,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:49:08,672 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:49:08,672 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:49:08,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:49:08,674 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:49:08,674 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:49:08,674 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:49:08,674 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:49:08,675 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:49:08,676 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:49:08,676 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:49:08,676 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:49:08,677 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:49:08,677 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:49:08,677 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:49:08,677 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:49:08,678 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:49:08,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:49:08,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:49:08,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:49:08,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:49:08,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:49:08,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:49:08,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:49:08,680 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:49:08,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:49:08,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:49:08,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:49:08,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:49:08,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:49:08,682 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:49:08,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:49:08,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:49:08,683 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:49:08,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:49:08,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:49:08,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:49:08,684 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_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2fd96106837ff3ee9325c248fea6969b94a5a1f2cee078fd159398f70369aafc [2022-11-19 07:49:09,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:49:09,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:49:09,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:49:09,049 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:49:09,055 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:49:09,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i [2022-11-19 07:49:09,134 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/data/54f11d3c6/ada9404ad4ac40a2b91f505b89d526cf/FLAGb402bdb71 [2022-11-19 07:49:10,005 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:49:10,006 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i [2022-11-19 07:49:10,053 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/data/54f11d3c6/ada9404ad4ac40a2b91f505b89d526cf/FLAGb402bdb71 [2022-11-19 07:49:10,482 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/data/54f11d3c6/ada9404ad4ac40a2b91f505b89d526cf [2022-11-19 07:49:10,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:49:10,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:49:10,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:49:10,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:49:10,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:49:10,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:49:10" (1/1) ... [2022-11-19 07:49:10,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54071bc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:10, skipping insertion in model container [2022-11-19 07:49:10,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:49:10" (1/1) ... [2022-11-19 07:49:10,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:49:10,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:49:11,011 WARN L234 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_b1796537-9f4f-4007-9038-0bcf25d0151d/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4499,4512] [2022-11-19 07:49:11,021 WARN L234 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_b1796537-9f4f-4007-9038-0bcf25d0151d/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4559,4572] [2022-11-19 07:49:12,100 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:12,101 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:12,102 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:12,103 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:12,104 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:12,119 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:12,120 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:12,122 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:12,123 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:12,606 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:49:12,608 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:49:12,610 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:49:12,611 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:49:12,613 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:49:12,613 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:49:12,614 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:49:12,615 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:49:12,616 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:49:12,617 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:49:12,794 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 07:49:12,994 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:12,994 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:13,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:49:13,167 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:49:13,199 WARN L234 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_b1796537-9f4f-4007-9038-0bcf25d0151d/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4499,4512] [2022-11-19 07:49:13,200 WARN L234 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_b1796537-9f4f-4007-9038-0bcf25d0151d/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4559,4572] [2022-11-19 07:49:13,277 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:13,277 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:13,278 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:13,278 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:13,281 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:13,295 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:13,295 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:13,296 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:13,296 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:13,341 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 07:49:13,342 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 07:49:13,343 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 07:49:13,344 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 07:49:13,345 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 07:49:13,346 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 07:49:13,346 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 07:49:13,347 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 07:49:13,347 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 07:49:13,348 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 07:49:13,371 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 07:49:13,430 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:13,430 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 07:49:13,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:49:13,746 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:49:13,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:13 WrapperNode [2022-11-19 07:49:13,747 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:49:13,748 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:49:13,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:49:13,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:49:13,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:13" (1/1) ... [2022-11-19 07:49:13,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:13" (1/1) ... [2022-11-19 07:49:14,006 INFO L138 Inliner]: procedures = 690, calls = 2619, calls flagged for inlining = 62, calls inlined = 10, statements flattened = 893 [2022-11-19 07:49:14,007 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:49:14,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:49:14,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:49:14,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:49:14,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:13" (1/1) ... [2022-11-19 07:49:14,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:13" (1/1) ... [2022-11-19 07:49:14,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:13" (1/1) ... [2022-11-19 07:49:14,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:13" (1/1) ... [2022-11-19 07:49:14,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:13" (1/1) ... [2022-11-19 07:49:14,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:13" (1/1) ... [2022-11-19 07:49:14,144 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:13" (1/1) ... [2022-11-19 07:49:14,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:13" (1/1) ... [2022-11-19 07:49:14,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:49:14,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:49:14,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:49:14,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:49:14,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:13" (1/1) ... [2022-11-19 07:49:14,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:49:14,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:49:14,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:49:14,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:49:14,241 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-11-19 07:49:14,242 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-11-19 07:49:14,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:49:14,243 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-19 07:49:14,244 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-19 07:49:14,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:49:14,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 07:49:14,245 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 07:49:14,245 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2022-11-19 07:49:14,245 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2022-11-19 07:49:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:49:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:49:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:49:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:49:14,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:49:14,290 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-19 07:49:14,290 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-19 07:49:14,290 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-11-19 07:49:14,290 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-11-19 07:49:14,291 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:49:14,291 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:49:14,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:49:14,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:49:14,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:49:14,291 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2022-11-19 07:49:14,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2022-11-19 07:49:14,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:49:14,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:49:14,630 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:49:14,641 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:49:15,996 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:49:16,191 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:49:16,192 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 07:49:16,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:49:16 BoogieIcfgContainer [2022-11-19 07:49:16,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:49:16,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:49:16,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:49:16,201 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:49:16,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:49:10" (1/3) ... [2022-11-19 07:49:16,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7921c985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:49:16, skipping insertion in model container [2022-11-19 07:49:16,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:13" (2/3) ... [2022-11-19 07:49:16,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7921c985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:49:16, skipping insertion in model container [2022-11-19 07:49:16,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:49:16" (3/3) ... [2022-11-19 07:49:16,205 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_trim_pred_harness.i [2022-11-19 07:49:16,225 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:49:16,225 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:49:16,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:49:16,285 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;@6bf43abd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:49:16,285 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:49:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-19 07:49:16,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-19 07:49:16,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:16,301 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:49:16,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:16,307 INFO L85 PathProgramCache]: Analyzing trace with hash 728730477, now seen corresponding path program 1 times [2022-11-19 07:49:16,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:16,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690179944] [2022-11-19 07:49:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:16,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 07:49:17,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:17,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690179944] [2022-11-19 07:49:17,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690179944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:49:17,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:49:17,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:49:17,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79640015] [2022-11-19 07:49:17,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:49:17,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:49:17,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:17,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:49:17,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:49:17,207 INFO L87 Difference]: Start difference. First operand has 97 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 07:49:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:17,676 INFO L93 Difference]: Finished difference Result 156 states and 227 transitions. [2022-11-19 07:49:17,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:49:17,679 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 51 [2022-11-19 07:49:17,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:17,694 INFO L225 Difference]: With dead ends: 156 [2022-11-19 07:49:17,695 INFO L226 Difference]: Without dead ends: 91 [2022-11-19 07:49:17,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:49:17,708 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:17,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 121 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:49:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-19 07:49:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-19 07:49:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 37 states have call successors, (37), 8 states have call predecessors, (37), 7 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-19 07:49:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 125 transitions. [2022-11-19 07:49:17,760 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 125 transitions. Word has length 51 [2022-11-19 07:49:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:17,763 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 125 transitions. [2022-11-19 07:49:17,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-19 07:49:17,764 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 125 transitions. [2022-11-19 07:49:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-19 07:49:17,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:17,767 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:49:17,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:49:17,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash -674183560, now seen corresponding path program 1 times [2022-11-19 07:49:17,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:17,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852886554] [2022-11-19 07:49:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:17,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:49:23,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:23,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852886554] [2022-11-19 07:49:23,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852886554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:49:23,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:49:23,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-19 07:49:23,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710499493] [2022-11-19 07:49:23,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:49:23,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:49:23,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:49:23,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:49:23,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:49:23,752 INFO L87 Difference]: Start difference. First operand 91 states and 125 transitions. Second operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-19 07:49:26,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:49:26,490 INFO L93 Difference]: Finished difference Result 123 states and 173 transitions. [2022-11-19 07:49:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:49:26,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 53 [2022-11-19 07:49:26,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:49:26,495 INFO L225 Difference]: With dead ends: 123 [2022-11-19 07:49:26,495 INFO L226 Difference]: Without dead ends: 121 [2022-11-19 07:49:26,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:49:26,497 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 99 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:49:26,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 718 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-19 07:49:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-19 07:49:26,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 100. [2022-11-19 07:49:26,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 54 states have internal predecessors, (61), 39 states have call successors, (39), 9 states have call predecessors, (39), 8 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-19 07:49:26,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 137 transitions. [2022-11-19 07:49:26,543 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 137 transitions. Word has length 53 [2022-11-19 07:49:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:49:26,548 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 137 transitions. [2022-11-19 07:49:26,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-19 07:49:26,548 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 137 transitions. [2022-11-19 07:49:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-19 07:49:26,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:49:26,551 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:49:26,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:49:26,552 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:49:26,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:49:26,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2146172008, now seen corresponding path program 1 times [2022-11-19 07:49:26,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:49:26,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642727499] [2022-11-19 07:49:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:26,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:49:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:49:33,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:49:33,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642727499] [2022-11-19 07:49:33,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642727499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:49:33,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033756168] [2022-11-19 07:49:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:49:33,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:49:33,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:49:33,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:49:33,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1796537-9f4f-4007-9038-0bcf25d0151d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:49:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:49:34,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 2563 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-19 07:49:34,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:49:34,540 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-11-19 07:49:34,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:49:34,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 07:49:37,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:37,446 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:49:37,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 62 [2022-11-19 07:49:37,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:49:37,461 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:49:37,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 43 [2022-11-19 07:49:38,990 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 07:49:38,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2022-11-19 07:49:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:49:39,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:49:40,652 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 13430 disjunctions. This might take some time... [2022-11-19 07:49:56,991 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.