./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --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 dfb764aa006e9b5f466bb95da84bbd3a91cb858f0f02cfd38405f6ba2daf69c6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:53:20,565 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:53:20,662 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-64bit-Taipan_Default.epf [2024-11-14 04:53:20,670 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:53:20,673 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:53:20,715 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:53:20,716 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:53:20,716 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:53:20,716 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:53:20,717 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:53:20,717 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:53:20,717 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:53:20,717 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:53:20,717 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:53:20,717 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:53:20,717 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:53:20,717 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:53:20,718 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:53:20,718 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:53:20,718 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:53:20,718 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:53:20,718 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:53:20,721 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:53:20,721 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:53:20,721 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:53:20,721 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:53:20,722 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:53:20,722 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:53:20,722 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:53:20,722 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:53:20,722 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:53:20,722 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:53:20,722 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:53:20,723 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:53:20,723 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:53:20,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:53:20,723 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:53:20,723 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:53:20,723 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:53:20,724 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:53:20,725 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:53:20,725 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:53:20,725 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:53:20,725 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:53:20,725 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 -> dfb764aa006e9b5f466bb95da84bbd3a91cb858f0f02cfd38405f6ba2daf69c6 [2024-11-14 04:53:21,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:53:21,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:53:21,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:53:21,118 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:53:21,119 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:53:21,120 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness_negated.i Unable to find full path for "g++" [2024-11-14 04:53:22,995 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:53:23,589 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:53:23,590 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness_negated.i [2024-11-14 04:53:23,632 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E/data/ae2fe7455/e2974defd59b40ef8742a3c57bdb2f4d/FLAGa57e86c98 [2024-11-14 04:53:23,653 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E/data/ae2fe7455/e2974defd59b40ef8742a3c57bdb2f4d [2024-11-14 04:53:23,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:53:23,659 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:53:23,661 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:53:23,662 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:53:23,668 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:53:23,668 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:53:23" (1/1) ... [2024-11-14 04:53:23,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c7d1c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:53:23, skipping insertion in model container [2024-11-14 04:53:23,670 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:53:23" (1/1) ... [2024-11-14 04:53:23,768 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:53:24,097 WARN L250 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_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness_negated.i[4494,4507] [2024-11-14 04:53:24,105 WARN L250 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_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness_negated.i[4554,4567] [2024-11-14 04:53:25,211 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:25,211 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:25,212 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:25,213 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:25,214 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:25,231 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:25,232 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:25,234 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:25,235 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:25,237 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:25,238 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:25,239 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:25,240 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:25,971 WARN L250 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_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness_negated.i[150695,150708] [2024-11-14 04:53:25,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:53:25,989 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:53:26,004 WARN L250 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_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness_negated.i[4494,4507] [2024-11-14 04:53:26,005 WARN L250 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_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness_negated.i[4554,4567] [2024-11-14 04:53:26,074 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:26,074 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:26,075 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:26,075 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:26,076 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:26,087 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:26,088 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:26,089 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:26,090 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:26,091 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:26,093 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:26,093 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:26,093 WARN L1684 CHandler]: Possible shadowing of function index [2024-11-14 04:53:26,206 WARN L250 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_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness_negated.i[150695,150708] [2024-11-14 04:53:26,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:53:26,404 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:53:26,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:53:26 WrapperNode [2024-11-14 04:53:26,405 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:53:26,406 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:53:26,406 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:53:26,406 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:53:26,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:53:26" (1/1) ... [2024-11-14 04:53:26,465 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:53:26" (1/1) ... [2024-11-14 04:53:26,538 INFO L138 Inliner]: procedures = 668, calls = 1039, calls flagged for inlining = 51, calls inlined = 4, statements flattened = 56 [2024-11-14 04:53:26,538 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:53:26,539 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:53:26,539 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:53:26,539 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:53:26,547 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:53:26" (1/1) ... [2024-11-14 04:53:26,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:53:26" (1/1) ... [2024-11-14 04:53:26,552 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:53:26" (1/1) ... [2024-11-14 04:53:26,552 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:53:26" (1/1) ... [2024-11-14 04:53:26,578 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:53:26" (1/1) ... [2024-11-14 04:53:26,581 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:53:26" (1/1) ... [2024-11-14 04:53:26,587 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:53:26" (1/1) ... [2024-11-14 04:53:26,590 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:53:26" (1/1) ... [2024-11-14 04:53:26,598 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:53:26,599 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:53:26,603 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:53:26,603 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:53:26,604 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:53:26" (1/1) ... [2024-11-14 04:53:26,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:53:26,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:53:26,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:53:26,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:53:26,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:53:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 04:53:26,675 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 04:53:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2024-11-14 04:53:26,675 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2024-11-14 04:53:26,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:53:26,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 04:53:26,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:53:26,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:53:26,677 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 04:53:26,677 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 04:53:26,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:53:26,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 04:53:26,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-14 04:53:26,678 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2024-11-14 04:53:26,678 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2024-11-14 04:53:26,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:53:26,971 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:53:26,973 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:53:27,176 INFO L? ?]: Removed 31 outVars from TransFormulas that were not future-live. [2024-11-14 04:53:27,176 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:53:27,299 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:53:27,302 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-14 04:53:27,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:53:27 BoogieIcfgContainer [2024-11-14 04:53:27,303 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:53:27,305 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:53:27,305 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:53:27,313 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:53:27,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:53:23" (1/3) ... [2024-11-14 04:53:27,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e1230ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:53:27, skipping insertion in model container [2024-11-14 04:53:27,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:53:26" (2/3) ... [2024-11-14 04:53:27,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e1230ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:53:27, skipping insertion in model container [2024-11-14 04:53:27,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:53:27" (3/3) ... [2024-11-14 04:53:27,316 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_prev_harness_negated.i [2024-11-14 04:53:27,337 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:53:27,340 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG aws_linked_list_prev_harness_negated.i that has 5 procedures, 33 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-14 04:53:27,409 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:53:27,428 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@3429a6ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:53:27,430 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:53:27,438 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-14 04:53:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 04:53:27,446 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:53:27,447 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:53:27,448 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:53:27,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:53:27,454 INFO L85 PathProgramCache]: Analyzing trace with hash 846701445, now seen corresponding path program 1 times [2024-11-14 04:53:27,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:53:27,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265307574] [2024-11-14 04:53:27,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:53:27,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:53:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 04:53:27,873 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-14 04:53:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 04:53:28,084 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-14 04:53:28,086 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-14 04:53:28,088 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-14 04:53:28,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:53:28,096 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-14 04:53:28,127 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 04:53:28,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 04:53:28 BoogieIcfgContainer [2024-11-14 04:53:28,132 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 04:53:28,134 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 04:53:28,134 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 04:53:28,134 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 04:53:28,135 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:53:27" (3/4) ... [2024-11-14 04:53:28,136 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-14 04:53:28,188 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E/witness.graphml [2024-11-14 04:53:28,189 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 04:53:28,192 INFO L158 Benchmark]: Toolchain (without parser) took 4531.44ms. Allocated memory is still 142.6MB. Free memory was 112.9MB in the beginning and 90.9MB in the end (delta: 22.0MB). Peak memory consumption was 19.1MB. Max. memory is 16.1GB. [2024-11-14 04:53:28,192 INFO L158 Benchmark]: CDTParser took 0.45ms. Allocated memory is still 167.8MB. Free memory is still 105.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:53:28,192 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2744.42ms. Allocated memory is still 142.6MB. Free memory was 112.9MB in the beginning and 54.8MB in the end (delta: 58.1MB). Peak memory consumption was 77.8MB. Max. memory is 16.1GB. [2024-11-14 04:53:28,193 INFO L158 Benchmark]: Boogie Procedure Inliner took 132.37ms. Allocated memory is still 142.6MB. Free memory was 54.8MB in the beginning and 103.5MB in the end (delta: -48.7MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. [2024-11-14 04:53:28,193 INFO L158 Benchmark]: Boogie Preprocessor took 59.16ms. Allocated memory is still 142.6MB. Free memory was 103.5MB in the beginning and 101.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:53:28,193 INFO L158 Benchmark]: RCFGBuilder took 703.59ms. Allocated memory is still 142.6MB. Free memory was 101.9MB in the beginning and 75.0MB in the end (delta: 26.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-14 04:53:28,195 INFO L158 Benchmark]: TraceAbstraction took 826.92ms. Allocated memory is still 142.6MB. Free memory was 74.2MB in the beginning and 93.0MB in the end (delta: -18.8MB). Peak memory consumption was 37.0MB. Max. memory is 16.1GB. [2024-11-14 04:53:28,195 INFO L158 Benchmark]: Witness Printer took 55.02ms. Allocated memory is still 142.6MB. Free memory was 93.0MB in the beginning and 90.9MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 04:53:28,197 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45ms. Allocated memory is still 167.8MB. Free memory is still 105.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2744.42ms. Allocated memory is still 142.6MB. Free memory was 112.9MB in the beginning and 54.8MB in the end (delta: 58.1MB). Peak memory consumption was 77.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 132.37ms. Allocated memory is still 142.6MB. Free memory was 54.8MB in the beginning and 103.5MB in the end (delta: -48.7MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.16ms. Allocated memory is still 142.6MB. Free memory was 103.5MB in the beginning and 101.9MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 703.59ms. Allocated memory is still 142.6MB. Free memory was 101.9MB in the beginning and 75.0MB in the end (delta: 26.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 826.92ms. Allocated memory is still 142.6MB. Free memory was 74.2MB in the beginning and 93.0MB in the end (delta: -18.8MB). Peak memory consumption was 37.0MB. Max. memory is 16.1GB. * Witness Printer took 55.02ms. Allocated memory is still 142.6MB. Free memory was 93.0MB in the beginning and 90.9MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 223]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L6903-L6908] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L7328] static __thread int tl_last_error = 0; [L7361] CALL aws_linked_list_prev_harness() [L7346] struct aws_linked_list_node node; [L7347] struct aws_linked_list_node before; [L7350] node.prev = &before [L7351] before.next = &node [L7354] CALL aws_linked_list_prev(&node) [L4849] CALL, EXPR aws_linked_list_node_prev_is_valid(node) VAL [\old(node)={9:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4731] EXPR node && node->prev [L4731] EXPR node->prev [L4731] EXPR node && node->prev [L4731] EXPR node && node->prev && node->prev->next == node [L4731] EXPR node->prev [L4731] EXPR node->prev->next [L4731] EXPR node && node->prev && node->prev->next == node [L4731] return node && node->prev && node->prev->next == node; [L4849] RET, EXPR aws_linked_list_node_prev_is_valid(node) VAL [node={9:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4849] CALL assume_abort_if_not((aws_linked_list_node_prev_is_valid(node))) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) [L4849] RET assume_abort_if_not((aws_linked_list_node_prev_is_valid(node))) VAL [node={9:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4850] EXPR node->prev [L4850] struct aws_linked_list_node *rval = node->prev; [L4851] CALL, EXPR aws_linked_list_node_prev_is_valid(node) VAL [\old(node)={9:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4731] EXPR node && node->prev [L4731] EXPR node->prev [L4731] EXPR node && node->prev [L4731] EXPR node && node->prev && node->prev->next == node [L4731] EXPR node->prev [L4731] EXPR node->prev->next [L4731] EXPR node && node->prev && node->prev->next == node [L4731] return node && node->prev && node->prev->next == node; [L4851] RET, EXPR aws_linked_list_node_prev_is_valid(node) VAL [node={9:0}, rval={7:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4851] CALL __VERIFIER_assert(!((aws_linked_list_node_prev_is_valid(node)))) VAL [\old(cond)=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L223] COND TRUE !cond VAL [\old(cond)=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L223] reach_error() VAL [\old(cond)=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-14 04:53:28,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daf9481c-4a8b-4b98-b10b-7e2a69128f7e/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE