./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje --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 14ecb1bdeb89e6f16cc91bd9d320557c2f2576024bfb946541efab4252b9f995 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:08:46,234 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:08:46,313 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-64bit-Taipan_Default.epf [2024-11-09 01:08:46,320 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:08:46,320 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:08:46,368 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:08:46,368 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:08:46,369 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:08:46,369 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:08:46,369 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:08:46,370 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:08:46,370 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:08:46,370 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:08:46,371 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:08:46,371 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:08:46,371 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:08:46,372 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:08:46,372 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:08:46,373 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:08:46,373 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:08:46,373 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:08:46,378 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:08:46,378 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:08:46,379 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:08:46,379 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:08:46,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:08:46,380 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:08:46,380 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:08:46,380 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:08:46,381 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:08:46,381 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:08:46,385 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:08:46,385 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:08:46,385 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:08:46,398 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:08:46,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:08:46,398 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:08:46,399 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:08:46,399 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:08:46,399 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:08:46,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:08:46,400 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:08:46,400 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:08:46,400 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:08:46,401 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14ecb1bdeb89e6f16cc91bd9d320557c2f2576024bfb946541efab4252b9f995 [2024-11-09 01:08:46,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:08:46,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:08:46,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:08:46,737 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:08:46,738 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:08:46,739 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i Unable to find full path for "g++" [2024-11-09 01:08:48,684 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:08:49,174 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:08:49,174 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2024-11-09 01:08:49,214 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/data/b9ae4014b/e88e953412734bbc82efb4876b082371/FLAG508e8e38a [2024-11-09 01:08:49,262 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/data/b9ae4014b/e88e953412734bbc82efb4876b082371 [2024-11-09 01:08:49,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:08:49,265 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:08:49,267 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:08:49,267 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:08:49,272 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:08:49,273 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:08:49" (1/1) ... [2024-11-09 01:08:49,274 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a75734d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:49, skipping insertion in model container [2024-11-09 01:08:49,274 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:08:49" (1/1) ... [2024-11-09 01:08:49,418 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:08:49,742 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_73299831-475d-4443-80d3-b4a70ff0d60a/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2024-11-09 01:08:49,751 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_73299831-475d-4443-80d3-b4a70ff0d60a/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2024-11-09 01:08:50,642 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:50,643 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:50,643 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:50,645 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:50,646 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:50,663 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:50,664 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:50,666 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:50,667 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:50,670 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:50,671 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:50,672 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:50,673 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:51,408 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_73299831-475d-4443-80d3-b4a70ff0d60a/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[150268,150281] [2024-11-09 01:08:51,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:08:51,426 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:08:51,441 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_73299831-475d-4443-80d3-b4a70ff0d60a/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2024-11-09 01:08:51,442 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_73299831-475d-4443-80d3-b4a70ff0d60a/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2024-11-09 01:08:51,518 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:51,518 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:51,519 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:51,519 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:51,520 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:51,536 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:51,536 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:51,542 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:51,542 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:51,546 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:51,547 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:51,548 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:51,548 WARN L1698 CHandler]: Possible shadowing of function index [2024-11-09 01:08:51,663 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_73299831-475d-4443-80d3-b4a70ff0d60a/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[150268,150281] [2024-11-09 01:08:51,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:08:51,892 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:08:51,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:51 WrapperNode [2024-11-09 01:08:51,892 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:08:51,894 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:08:51,894 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:08:51,894 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:08:51,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:51" (1/1) ... [2024-11-09 01:08:51,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:51" (1/1) ... [2024-11-09 01:08:51,986 INFO L138 Inliner]: procedures = 668, calls = 1032, calls flagged for inlining = 49, calls inlined = 3, statements flattened = 27 [2024-11-09 01:08:51,986 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:08:51,987 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:08:51,987 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:08:51,987 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:08:52,040 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:51" (1/1) ... [2024-11-09 01:08:52,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:51" (1/1) ... [2024-11-09 01:08:52,043 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:51" (1/1) ... [2024-11-09 01:08:52,043 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:51" (1/1) ... [2024-11-09 01:08:52,059 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:51" (1/1) ... [2024-11-09 01:08:52,066 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:51" (1/1) ... [2024-11-09 01:08:52,072 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:51" (1/1) ... [2024-11-09 01:08:52,077 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:51" (1/1) ... [2024-11-09 01:08:52,083 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:08:52,084 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:08:52,088 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:08:52,089 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:08:52,089 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:51" (1/1) ... [2024-11-09 01:08:52,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:08:52,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:08:52,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:08:52,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:08:52,239 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2024-11-09 01:08:52,240 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2024-11-09 01:08:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2024-11-09 01:08:52,240 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2024-11-09 01:08:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 01:08:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 01:08:52,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 01:08:52,240 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 01:08:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:08:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:08:52,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:08:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2024-11-09 01:08:52,241 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2024-11-09 01:08:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 01:08:52,241 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 01:08:52,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 01:08:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-09 01:08:52,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:08:52,486 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:08:52,489 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:08:52,712 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2024-11-09 01:08:52,712 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:08:52,765 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:08:52,766 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 01:08:52,767 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:08:52 BoogieIcfgContainer [2024-11-09 01:08:52,767 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:08:52,770 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:08:52,770 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:08:52,775 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:08:52,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:08:49" (1/3) ... [2024-11-09 01:08:52,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ec4087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:08:52, skipping insertion in model container [2024-11-09 01:08:52,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:51" (2/3) ... [2024-11-09 01:08:52,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ec4087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:08:52, skipping insertion in model container [2024-11-09 01:08:52,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:08:52" (3/3) ... [2024-11-09 01:08:52,780 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness.i [2024-11-09 01:08:52,800 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:08:52,800 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 01:08:52,862 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:08:52,868 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;@469e3b66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:08:52,869 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 01:08:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 01:08:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 01:08:52,884 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:08:52,885 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:08:52,886 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:08:52,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:08:52,894 INFO L85 PathProgramCache]: Analyzing trace with hash 381485332, now seen corresponding path program 1 times [2024-11-09 01:08:52,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:08:52,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122411474] [2024-11-09 01:08:52,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:08:52,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:08:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:08:53,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:08:53,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122411474] [2024-11-09 01:08:53,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122411474] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:08:53,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:08:53,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:08:53,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650624770] [2024-11-09 01:08:53,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:08:53,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-09 01:08:53,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:08:53,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-09 01:08:53,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-09 01:08:53,248 INFO L87 Difference]: Start difference. First operand has 33 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:08:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:08:53,281 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2024-11-09 01:08:53,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 01:08:53,284 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-11-09 01:08:53,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:08:53,292 INFO L225 Difference]: With dead ends: 60 [2024-11-09 01:08:53,292 INFO L226 Difference]: Without dead ends: 31 [2024-11-09 01:08:53,295 INFO L431 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 [2024-11-09 01:08:53,298 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:08:53,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:08:53,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-09 01:08:53,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-09 01:08:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 01:08:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-09 01:08:53,332 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 17 [2024-11-09 01:08:53,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:08:53,332 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-09 01:08:53,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 01:08:53,332 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-09 01:08:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 01:08:53,334 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:08:53,334 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:08:53,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:08:53,335 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:08:53,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:08:53,346 INFO L85 PathProgramCache]: Analyzing trace with hash -533231504, now seen corresponding path program 1 times [2024-11-09 01:08:53,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:08:53,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281876301] [2024-11-09 01:08:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:08:53,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:08:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:08:54,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:08:54,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281876301] [2024-11-09 01:08:54,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281876301] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:08:54,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:08:54,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 01:08:54,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621710839] [2024-11-09 01:08:54,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:08:54,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 01:08:54,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:08:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 01:08:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:08:54,030 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 01:08:54,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:08:54,125 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2024-11-09 01:08:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 01:08:54,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2024-11-09 01:08:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:08:54,128 INFO L225 Difference]: With dead ends: 41 [2024-11-09 01:08:54,130 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 01:08:54,130 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:08:54,131 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:08:54,133 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 142 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:08:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 01:08:54,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-11-09 01:08:54,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 24 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-09 01:08:54,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2024-11-09 01:08:54,144 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2024-11-09 01:08:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:08:54,144 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2024-11-09 01:08:54,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-09 01:08:54,145 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2024-11-09 01:08:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 01:08:54,148 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:08:54,148 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:08:54,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 01:08:54,149 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:08:54,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:08:54,150 INFO L85 PathProgramCache]: Analyzing trace with hash -453296917, now seen corresponding path program 1 times [2024-11-09 01:08:54,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:08:54,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386100100] [2024-11-09 01:08:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:08:54,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:08:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:08:54,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:08:54,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386100100] [2024-11-09 01:08:54,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386100100] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:08:54,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:08:54,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 01:08:54,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943121127] [2024-11-09 01:08:54,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:08:54,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:08:54,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:08:54,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:08:54,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:08:54,427 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 01:08:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:08:54,469 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2024-11-09 01:08:54,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:08:54,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-11-09 01:08:54,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:08:54,482 INFO L225 Difference]: With dead ends: 68 [2024-11-09 01:08:54,482 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 01:08:54,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:08:54,484 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:08:54,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:08:54,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 01:08:54,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-09 01:08:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-09 01:08:54,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2024-11-09 01:08:54,508 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 23 [2024-11-09 01:08:54,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:08:54,508 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2024-11-09 01:08:54,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-09 01:08:54,512 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2024-11-09 01:08:54,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 01:08:54,513 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:08:54,513 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:08:54,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 01:08:54,514 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:08:54,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:08:54,515 INFO L85 PathProgramCache]: Analyzing trace with hash -156882313, now seen corresponding path program 1 times [2024-11-09 01:08:54,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:08:54,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068866202] [2024-11-09 01:08:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:08:54,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:08:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:08:54,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:08:54,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068866202] [2024-11-09 01:08:54,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068866202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:08:54,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090036334] [2024-11-09 01:08:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:08:54,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:08:54,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:08:54,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:08:54,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:08:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:55,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 01:08:55,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:08:55,270 INFO L378 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 11 treesize of output 7 [2024-11-09 01:08:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:08:55,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:08:56,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-09 01:08:56,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-09 01:08:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:08:56,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090036334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:08:56,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2006727742] [2024-11-09 01:08:56,459 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:08:56,459 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:08:56,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:08:56,471 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:08:56,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:08:56,617 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:08:58,428 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 116 for LOIs [2024-11-09 01:08:58,494 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:08:58,514 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:08:58,643 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:08:58,990 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:09:03,102 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '651#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| (Array Int (Array Int Int)))) (and (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 0)) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_7| 4) 16)))) (exists ((|v_old(#memory_int)_BEFORE_CALL_7| (Array Int (Array Int Int)))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 1) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_7| 1) 0) 48))) (exists ((|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| (Array Int (Array Int Int)))) (and (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 32) 0) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_7| 4) 16)))) (= |__VERIFIER_assert_#in~cond| 0) (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_13 Int) (|v_#length_8| (Array Int Int)) (|v_#valid_18| (Array Int Int))) (and (= (select |v_#valid_18| 2) 1) (= (store |v_#valid_18| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_13 1) |#valid|) (= (select |v_#valid_18| 0) 0) (= 1 (select |v_#valid_18| 1)) (= (select |v_#length_8| 2) 37) (= (store |v_#length_8| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_13 16) |#length|) (= (select |v_#valid_18| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_13) 0) (<= (+ |#StackHeapBarrier| 1) v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_13) (= (select |v_#length_8| 3) 12) (= (select |v_#length_8| 4) 40) (= (select |v_#valid_18| 4) 1) (= (select |v_#valid_18| 3) 1) (not (= (mod (select (select |#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_13) 0) 256) 0)) (= (select |v_#length_8| 1) 2))) (= ~tl_last_error~0 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_18| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_18| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_18|))))' at error location [2024-11-09 01:09:03,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:09:03,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:09:03,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 10] total 23 [2024-11-09 01:09:03,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481154331] [2024-11-09 01:09:03,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:09:03,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 01:09:03,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:03,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 01:09:03,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1292, Unknown=0, NotChecked=0, Total=1406 [2024-11-09 01:09:03,106 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 23 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:09:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:03,741 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2024-11-09 01:09:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 01:09:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 24 [2024-11-09 01:09:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:03,744 INFO L225 Difference]: With dead ends: 74 [2024-11-09 01:09:03,744 INFO L226 Difference]: Without dead ends: 45 [2024-11-09 01:09:03,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=159, Invalid=1821, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 01:09:03,748 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:03,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 238 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:09:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-09 01:09:03,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-11-09 01:09:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 31 states have internal predecessors, (36), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 01:09:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-11-09 01:09:03,766 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 24 [2024-11-09 01:09:03,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:03,766 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-11-09 01:09:03,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 20 states have internal predecessors, (40), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:09:03,767 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-11-09 01:09:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 01:09:03,767 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:03,767 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:03,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 01:09:03,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:03,968 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:03,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:03,969 INFO L85 PathProgramCache]: Analyzing trace with hash -237479987, now seen corresponding path program 1 times [2024-11-09 01:09:03,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:03,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107796419] [2024-11-09 01:09:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:03,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 01:09:04,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:04,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107796419] [2024-11-09 01:09:04,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107796419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:04,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307944601] [2024-11-09 01:09:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:04,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:04,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:04,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:09:04,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:09:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:04,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-09 01:09:04,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:09:04,442 INFO L378 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 11 treesize of output 7 [2024-11-09 01:09:04,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 01:09:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 01:09:04,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:09:05,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-09 01:09:05,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-11-09 01:09:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:05,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307944601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:09:05,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2055378945] [2024-11-09 01:09:05,363 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:09:05,363 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:09:05,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:09:05,363 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:09:05,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:09:05,426 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:09:06,705 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:09:07,044 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:09:07,055 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:09:07,382 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:09:07,595 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:09:11,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1054#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| Int) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_28 Int) (|v_old(#memory_int)_BEFORE_CALL_17| (Array Int (Array Int Int)))) (or (and (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 24)) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_38| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_38|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_38| 18446744073709551616)))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 24)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_28) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 32) 0) (exists ((|v_#length_9| (Array Int Int))) (and (= (select |v_#length_9| 1) 2) (= |#length| (store |v_#length_9| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 16)) (= (select |v_#length_9| 2) 37) (= 40 (select |v_#length_9| 4)) (= (select |v_#length_9| 3) 12))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 16)) (exists ((|v_#valid_19| (Array Int Int))) (and (= (select |v_#valid_19| 4) 1) (= (select |v_#valid_19| 2) 1) (= (select |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1) (= (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|))) (exists ((|v_aws_is_mem_zeroed_#t~mem42_24| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_4 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_4 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_4 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_24| 256) 0)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_4) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_4 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_24|)) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_4) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_4 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_24|))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_4 18446744073709551616)))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1))) (and (exists ((|v_aws_is_mem_zeroed_#t~mem42_24| Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_3 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_3 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_3 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_24| 256) 0)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616) 9223372036854775807) (= |v_aws_is_mem_zeroed_#t~mem42_24| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_3) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_3)))) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_3) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_3 (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_24|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616)))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_3 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 24)) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_38| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_38|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_38| 18446744073709551616)))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 24)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_28) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 0)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 32) 0) (exists ((|v_#length_9| (Array Int Int))) (and (= (select |v_#length_9| 1) 2) (= |#length| (store |v_#length_9| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 16)) (= (select |v_#length_9| 2) 37) (= 40 (select |v_#length_9| 4)) (= (select |v_#length_9| 3) 12))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_17| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_17| 4) 16)) (exists ((|v_#valid_19| (Array Int Int))) (and (= (select |v_#valid_19| 4) 1) (= (select |v_#valid_19| 2) 1) (= (select |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17|) 0) (= (select |v_#valid_19| 0) 0) (= (select |v_#valid_19| 1) 1) (= (select |v_#valid_19| 3) 1) (= (store |v_#valid_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_17| 1) |#valid|))) (= 0 (select (select |v_old(#memory_int)_BEFORE_CALL_17| 1) 1))))) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:09:11,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:09:11,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:09:11,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 13] total 24 [2024-11-09 01:09:11,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225238402] [2024-11-09 01:09:11,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:09:11,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 01:09:11,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:11,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 01:09:11,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1426, Unknown=1, NotChecked=0, Total=1560 [2024-11-09 01:09:11,500 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 24 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 22 states have internal predecessors, (46), 5 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 01:09:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:12,234 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2024-11-09 01:09:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 01:09:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 22 states have internal predecessors, (46), 5 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 28 [2024-11-09 01:09:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:12,235 INFO L225 Difference]: With dead ends: 86 [2024-11-09 01:09:12,236 INFO L226 Difference]: Without dead ends: 52 [2024-11-09 01:09:12,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=160, Invalid=1731, Unknown=1, NotChecked=0, Total=1892 [2024-11-09 01:09:12,238 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:12,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 331 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:09:12,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-09 01:09:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2024-11-09 01:09:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.34375) internal successors, (43), 35 states have internal predecessors, (43), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 01:09:12,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2024-11-09 01:09:12,249 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 28 [2024-11-09 01:09:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:12,250 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2024-11-09 01:09:12,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 22 states have internal predecessors, (46), 5 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 01:09:12,250 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2024-11-09 01:09:12,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 01:09:12,251 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:12,251 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:12,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:09:12,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:12,452 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:12,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:12,452 INFO L85 PathProgramCache]: Analyzing trace with hash -574915401, now seen corresponding path program 2 times [2024-11-09 01:09:12,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:12,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222228643] [2024-11-09 01:09:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:12,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 01:09:12,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:12,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222228643] [2024-11-09 01:09:12,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222228643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:12,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663322515] [2024-11-09 01:09:12,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:09:12,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:12,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:12,839 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:09:12,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:09:13,008 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 01:09:13,008 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:09:13,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-09 01:09:13,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:09:13,072 INFO L378 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 11 treesize of output 7 [2024-11-09 01:09:13,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 01:09:13,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:09:13,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2024-11-09 01:09:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 01:09:13,200 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:09:14,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-09 01:09:14,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-11-09 01:09:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:14,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663322515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:09:14,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1470319680] [2024-11-09 01:09:14,632 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:09:14,632 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:09:14,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:09:14,632 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:09:14,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:09:14,689 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:09:15,853 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:09:16,098 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:09:16,108 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:09:16,335 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:09:16,538 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:09:20,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1506#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| (Array Int (Array Int Int))) (|v_old(#memory_int)_BEFORE_CALL_27| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_43 Int)) (or (and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 16)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 0) 48) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_61| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_61| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_61|))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 1) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_5 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_5 Int) (|v_aws_is_mem_zeroed_#t~mem42_41| Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_5 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_5 18446744073709551616)) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_41| 256) 0)) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 18446744073709551616)) (= |v_aws_is_mem_zeroed_#t~mem42_41| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_5) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_5 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 18446744073709551616))))) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 18446744073709551616) 9223372036854775807) (= |v_aws_is_mem_zeroed_#t~mem42_41| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_5) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_5 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5 18446744073709551616)))))))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#length_10| (Array Int Int))) (and (= (select |v_#length_10| 4) 40) (= |#length| (store |v_#length_10| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| 16)) (= (select |v_#length_10| 3) 12) (= 2 (select |v_#length_10| 1)) (= (select |v_#length_10| 2) 37))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_43) (exists ((|v_#valid_20| (Array Int Int))) (and (= (select |v_#valid_20| 0) 0) (= (select |v_#valid_20| 3) 1) (= (select |v_#valid_20| 2) 1) (= (select |v_#valid_20| 4) 1) (= (select |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27|) 0) (= (select |v_#valid_20| 1) 1) (= (store |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| 1) |#valid|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|)) (and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 16)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 0) 48) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_61| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_61| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_61|))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_27| 1) 1) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_27| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#length_10| (Array Int Int))) (and (= (select |v_#length_10| 4) 40) (= |#length| (store |v_#length_10| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| 16)) (= (select |v_#length_10| 3) 12) (= 2 (select |v_#length_10| 1)) (= (select |v_#length_10| 2) 37))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27|) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6 Int) (|v_aws_is_mem_zeroed_#t~mem42_41| Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_6 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_6 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_6 Int)) (and (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_6 18446744073709551616)) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_41| 256) 0)) (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_6) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_6 (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_41|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6 18446744073709551616))) (and (= |v_aws_is_mem_zeroed_#t~mem42_41| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_6) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_6))) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6 18446744073709551616) 9223372036854775807))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_43) (exists ((|v_#valid_20| (Array Int Int))) (and (= (select |v_#valid_20| 0) 0) (= (select |v_#valid_20| 3) 1) (= (select |v_#valid_20| 2) 1) (= (select |v_#valid_20| 4) 1) (= (select |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27|) 0) (= (select |v_#valid_20| 1) 1) (= (store |v_#valid_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_27| 1) |#valid|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_27| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|)))) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:09:20,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:09:20,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:09:20,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 17] total 30 [2024-11-09 01:09:20,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270458249] [2024-11-09 01:09:20,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:09:20,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 01:09:20,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:20,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 01:09:20,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1905, Unknown=1, NotChecked=0, Total=2070 [2024-11-09 01:09:20,915 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 30 states, 23 states have (on average 2.260869565217391) internal successors, (52), 27 states have internal predecessors, (52), 6 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 01:09:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:23,127 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2024-11-09 01:09:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 01:09:23,129 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 2.260869565217391) internal successors, (52), 27 states have internal predecessors, (52), 6 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 32 [2024-11-09 01:09:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:23,130 INFO L225 Difference]: With dead ends: 101 [2024-11-09 01:09:23,130 INFO L226 Difference]: Without dead ends: 64 [2024-11-09 01:09:23,131 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=213, Invalid=2542, Unknown=1, NotChecked=0, Total=2756 [2024-11-09 01:09:23,132 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:23,132 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 373 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 01:09:23,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-09 01:09:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2024-11-09 01:09:23,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 39 states have internal predecessors, (50), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 01:09:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2024-11-09 01:09:23,147 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 32 [2024-11-09 01:09:23,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:23,147 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2024-11-09 01:09:23,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 2.260869565217391) internal successors, (52), 27 states have internal predecessors, (52), 6 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 01:09:23,147 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2024-11-09 01:09:23,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 01:09:23,148 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:23,148 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:23,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 01:09:23,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:23,353 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:23,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1153658483, now seen corresponding path program 3 times [2024-11-09 01:09:23,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:23,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051621803] [2024-11-09 01:09:23,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:23,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 01:09:23,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:23,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051621803] [2024-11-09 01:09:23,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051621803] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:23,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552219037] [2024-11-09 01:09:23,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:09:23,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:23,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:23,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:09:23,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:09:23,865 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:09:23,866 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:09:23,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-09 01:09:23,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:09:23,938 INFO L378 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 11 treesize of output 7 [2024-11-09 01:09:23,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 01:09:24,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:09:24,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2024-11-09 01:09:24,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:09:24,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-09 01:09:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:24,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:09:25,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2024-11-09 01:09:25,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2024-11-09 01:09:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:26,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552219037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:09:26,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019677631] [2024-11-09 01:09:26,045 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:09:26,045 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:09:26,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:09:26,046 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:09:26,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:09:26,105 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:09:27,015 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:09:27,292 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:09:27,302 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:09:27,529 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:09:27,693 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:09:32,196 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2024#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| Int) (|v_old(#memory_int)_BEFORE_CALL_37| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_59 Int) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| (Array Int (Array Int Int)))) (or (and (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_59) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 0)) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_84| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_84| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_84|))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_37| 1) 1) 0) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 32) 0) (exists ((|v_#valid_21| (Array Int Int))) (and (= (store |v_#valid_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| 1) |#valid|) (= (select |v_#valid_21| 4) 1) (= (select |v_#valid_21| 1) 1) (= (select |v_#valid_21| 0) 0) (= (select |v_#valid_21| 2) 1) (= (select |v_#valid_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37|) 0) (= (select |v_#valid_21| 3) 1))) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_7 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_7 Int) (|v_aws_is_mem_zeroed_#t~mem42_61| Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_7 Int)) (and (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_7 18446744073709551616)) (or (and (= |v_aws_is_mem_zeroed_#t~mem42_61| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_7) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_7 (- 18446744073709551616)))) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7 18446744073709551616))) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_7) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_7)) |v_aws_is_mem_zeroed_#t~mem42_61|))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_61| 256) 0)))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_37| 1) 0) 48) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 32) 0) (exists ((|v_#length_11| (Array Int Int))) (and (= |#length| (store |v_#length_11| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| 16)) (= (select |v_#length_11| 4) 40) (= (select |v_#length_11| 3) 12) (= (select |v_#length_11| 2) 37) (= 2 (select |v_#length_11| 1))))) (and (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_8 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8 Int) (|v_aws_is_mem_zeroed_#t~mem42_61| Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_8 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_8 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_8 18446744073709551616)) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8 18446744073709551616)) (= |v_aws_is_mem_zeroed_#t~mem42_61| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_8) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_8 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8 18446744073709551616))))) (and (= |v_aws_is_mem_zeroed_#t~mem42_61| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_8) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_8 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8 18446744073709551616)))) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8 18446744073709551616) 9223372036854775807))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_61| 256) 0)))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_59) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 0)) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_84| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_84| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_84|))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_37| 1) 1) 0) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 32) 0) (exists ((|v_#valid_21| (Array Int Int))) (and (= (store |v_#valid_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| 1) |#valid|) (= (select |v_#valid_21| 4) 1) (= (select |v_#valid_21| 1) 1) (= (select |v_#valid_21| 0) 0) (= (select |v_#valid_21| 2) 1) (= (select |v_#valid_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37|) 0) (= (select |v_#valid_21| 3) 1))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_37| 1) 0) 48) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_37| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_37| 4) 32) 0) (exists ((|v_#length_11| (Array Int Int))) (and (= |#length| (store |v_#length_11| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_37| 16)) (= (select |v_#length_11| 4) 40) (= (select |v_#length_11| 3) 12) (= (select |v_#length_11| 2) 37) (= 2 (select |v_#length_11| 1))))))) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:09:32,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:09:32,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:09:32,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 19, 16] total 38 [2024-11-09 01:09:32,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340045478] [2024-11-09 01:09:32,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:09:32,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 01:09:32,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:32,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 01:09:32,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2683, Unknown=1, NotChecked=0, Total=2862 [2024-11-09 01:09:32,201 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 38 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:09:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:33,788 INFO L93 Difference]: Finished difference Result 103 states and 138 transitions. [2024-11-09 01:09:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 01:09:33,789 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 36 [2024-11-09 01:09:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:33,790 INFO L225 Difference]: With dead ends: 103 [2024-11-09 01:09:33,790 INFO L226 Difference]: Without dead ends: 63 [2024-11-09 01:09:33,792 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=236, Invalid=3423, Unknown=1, NotChecked=0, Total=3660 [2024-11-09 01:09:33,793 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 41 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:33,793 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 434 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 01:09:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-09 01:09:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2024-11-09 01:09:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.425) internal successors, (57), 43 states have internal predecessors, (57), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 01:09:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2024-11-09 01:09:33,815 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 36 [2024-11-09 01:09:33,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:33,815 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2024-11-09 01:09:33,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:09:33,816 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2024-11-09 01:09:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 01:09:33,817 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:33,817 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:33,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 01:09:34,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:34,020 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:34,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:34,021 INFO L85 PathProgramCache]: Analyzing trace with hash 800603891, now seen corresponding path program 1 times [2024-11-09 01:09:34,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:34,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794492211] [2024-11-09 01:09:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:34,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 01:09:34,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:34,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794492211] [2024-11-09 01:09:34,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794492211] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:34,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:34,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 01:09:34,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381216422] [2024-11-09 01:09:34,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:34,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 01:09:34,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:34,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 01:09:34,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:09:34,383 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 01:09:34,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:34,446 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2024-11-09 01:09:34,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 01:09:34,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 40 [2024-11-09 01:09:34,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:34,448 INFO L225 Difference]: With dead ends: 66 [2024-11-09 01:09:34,448 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 01:09:34,448 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:09:34,449 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 3 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:34,451 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 156 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 01:09:34,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 01:09:34,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-09 01:09:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 45 states have internal predecessors, (58), 8 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-09 01:09:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2024-11-09 01:09:34,480 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 40 [2024-11-09 01:09:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:34,481 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2024-11-09 01:09:34,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-09 01:09:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2024-11-09 01:09:34,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 01:09:34,485 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:34,485 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:34,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 01:09:34,485 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:34,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:34,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1825277752, now seen corresponding path program 1 times [2024-11-09 01:09:34,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:34,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205668252] [2024-11-09 01:09:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:34,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 01:09:34,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:34,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205668252] [2024-11-09 01:09:34,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205668252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:34,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120717904] [2024-11-09 01:09:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:34,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:34,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:34,843 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:09:34,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 01:09:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:34,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 01:09:34,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:09:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 01:09:35,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:09:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 01:09:35,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120717904] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:09:35,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2052228471] [2024-11-09 01:09:35,176 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-09 01:09:35,177 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:09:35,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:09:35,178 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:09:35,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:09:35,597 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:09:36,335 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:09:36,346 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 116 for LOIs [2024-11-09 01:09:36,384 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:09:36,456 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:09:36,603 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:09:39,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2760#(and (exists ((|v_#Ultimate.C_memset_#t~loopctr684_107| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_107|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_107| 18446744073709551616)))) (<= 1 |#StackHeapBarrier|) (exists ((|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_49| (Array Int (Array Int Int)))) (and (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_49| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_49| 4) 16)) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_49| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_49| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_49| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|))) (exists ((|v_old(#memory_int)_BEFORE_CALL_49| (Array Int (Array Int Int)))) (and (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_49| 1) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_49| 1) 1) 0))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_#valid_22| (Array Int Int)) (|v_#length_12| (Array Int Int)) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_79 Int)) (and (= (select |v_#valid_22| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_79) 0) (= 2 (select |v_#length_12| 1)) (= (store |v_#length_12| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_79 16) |#length|) (= (select |v_#valid_22| 3) 1) (= (select |v_#valid_22| 2) 1) (= (select |v_#valid_22| 1) 1) (= (select |v_#valid_22| 0) 0) (not (= (mod (select (select |#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_79) 0) 256) 0)) (= (store |v_#valid_22| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_79 1) |#valid|) (= (select |v_#valid_22| 4) 1) (= (select |v_#length_12| 2) 37) (= 40 (select |v_#length_12| 4)) (= (select |v_#length_12| 3) 12) (<= (+ |#StackHeapBarrier| 1) v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_79))) (exists ((|v_old(#memory_$Pointer$.base)_BEFORE_CALL_49| (Array Int (Array Int Int)))) (and (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_49| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_49| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_49| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_49| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_49| 4) 8) |#funAddr~s_can_fail_free_allocator.base|))) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:09:39,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:09:39,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:09:39,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 14 [2024-11-09 01:09:39,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503350000] [2024-11-09 01:09:39,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:09:39,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 01:09:39,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:39,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 01:09:39,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2024-11-09 01:09:39,647 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-09 01:09:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:39,997 INFO L93 Difference]: Finished difference Result 113 states and 149 transitions. [2024-11-09 01:09:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 01:09:39,998 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 41 [2024-11-09 01:09:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:39,999 INFO L225 Difference]: With dead ends: 113 [2024-11-09 01:09:39,999 INFO L226 Difference]: Without dead ends: 62 [2024-11-09 01:09:40,000 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 01:09:40,002 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:40,002 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 202 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 01:09:40,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-09 01:09:40,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2024-11-09 01:09:40,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 46 states have internal predecessors, (52), 8 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-09 01:09:40,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2024-11-09 01:09:40,028 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 41 [2024-11-09 01:09:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:40,032 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2024-11-09 01:09:40,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.769230769230769) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-09 01:09:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2024-11-09 01:09:40,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 01:09:40,033 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:40,033 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:40,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 01:09:40,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:40,234 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:40,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:40,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1862793963, now seen corresponding path program 4 times [2024-11-09 01:09:40,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:40,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744503954] [2024-11-09 01:09:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:40,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 01:09:40,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:40,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744503954] [2024-11-09 01:09:40,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744503954] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:40,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308340912] [2024-11-09 01:09:40,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:09:40,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:40,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:40,693 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:09:40,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 01:09:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:40,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-09 01:09:40,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:09:41,007 INFO L378 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 11 treesize of output 7 [2024-11-09 01:09:41,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 01:09:41,064 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:09:41,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2024-11-09 01:09:41,104 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:09:41,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-09 01:09:41,171 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:09:41,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-09 01:09:41,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:09:41,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-09 01:09:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:42,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:09:44,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2024-11-09 01:09:44,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2024-11-09 01:09:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:44,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308340912] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:09:44,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [454926102] [2024-11-09 01:09:44,712 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:09:44,712 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:09:44,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:09:44,712 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:09:44,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:09:44,741 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:09:45,492 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:09:45,706 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:09:45,717 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:09:45,973 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:09:46,213 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:09:51,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3342#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_95 Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_59| (Array Int (Array Int Int))) (|v_old(#memory_int)_BEFORE_CALL_59| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| Int) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_59| (Array Int (Array Int Int)))) (or (and (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_59| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_59| 1) 1) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_59| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_59| 4) 24)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_95) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_59| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_59| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (exists ((|v_#length_13| (Array Int Int))) (and (= (select |v_#length_13| 3) 12) (= 2 (select |v_#length_13| 1)) (= 40 (select |v_#length_13| 4)) (= |#length| (store |v_#length_13| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 16)) (= (select |v_#length_13| 2) 37))) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_59| 4) 16)) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_136| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_136|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_136| 18446744073709551616)))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_59| 1) 0) 48) (exists ((|v_#valid_23| (Array Int Int))) (and (= (select |v_#valid_23| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) 0) (= (store |v_#valid_23| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 1) |#valid|) (= (select |v_#valid_23| 1) 1) (= (select |v_#valid_23| 4) 1) (= (select |v_#valid_23| 0) 0) (= (select |v_#valid_23| 2) 1) (= (select |v_#valid_23| 3) 1))) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_59| 4) 0)) (exists ((|v_aws_is_mem_zeroed_#t~mem42_88| Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_14 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_14 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_14 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_14 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_88| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_14 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_14 18446744073709551616)) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_14 18446744073709551616)) (= |v_aws_is_mem_zeroed_#t~mem42_88| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_14) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_14 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_14 (- 18446744073709551616))))) (and (= |v_aws_is_mem_zeroed_#t~mem42_88| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_14) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_14 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_14))) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_14 18446744073709551616) 9223372036854775807))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_14))) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_59| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_59| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_59| 4) 0))) (and (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_59| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_59| 1) 1) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_59| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_59| 4) 24)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_95) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_59| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_59| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (exists ((|v_#length_13| (Array Int Int))) (and (= (select |v_#length_13| 3) 12) (= 2 (select |v_#length_13| 1)) (= 40 (select |v_#length_13| 4)) (= |#length| (store |v_#length_13| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 16)) (= (select |v_#length_13| 2) 37))) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_59| 4) 16)) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_136| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_136|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_136| 18446744073709551616)))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_59| 1) 0) 48) (exists ((|v_#valid_23| (Array Int Int))) (and (= (select |v_#valid_23| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67|) 0) (= (store |v_#valid_23| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_67| 1) |#valid|) (= (select |v_#valid_23| 1) 1) (= (select |v_#valid_23| 4) 1) (= (select |v_#valid_23| 0) 0) (= (select |v_#valid_23| 2) 1) (= (select |v_#valid_23| 3) 1))) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_59| 4) 0)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_59| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_59| 4) 32) 0) (exists ((|v_aws_is_mem_zeroed_#t~mem42_88| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_13 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_13 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_13 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_88| 256) 0)) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_13) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_13 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13 18446744073709551616) (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_88|)) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_13) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_13 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_88|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13 18446744073709551616) 9223372036854775807))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_13 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_13))) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_59| 4) 0))))) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:09:51,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:09:51,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:09:51,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 22, 19] total 46 [2024-11-09 01:09:51,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847649017] [2024-11-09 01:09:51,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:09:51,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 01:09:51,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:51,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 01:09:51,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3541, Unknown=1, NotChecked=0, Total=3782 [2024-11-09 01:09:51,345 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 46 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 43 states have internal predecessors, (80), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:09:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:53,810 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2024-11-09 01:09:53,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 01:09:53,811 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 43 states have internal predecessors, (80), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 41 [2024-11-09 01:09:53,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:53,812 INFO L225 Difference]: With dead ends: 115 [2024-11-09 01:09:53,812 INFO L226 Difference]: Without dead ends: 70 [2024-11-09 01:09:53,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=337, Invalid=4918, Unknown=1, NotChecked=0, Total=5256 [2024-11-09 01:09:53,814 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 36 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:53,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 550 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 01:09:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-09 01:09:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2024-11-09 01:09:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 50 states have internal predecessors, (58), 8 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-09 01:09:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2024-11-09 01:09:53,837 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 41 [2024-11-09 01:09:53,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:53,838 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2024-11-09 01:09:53,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 43 states have internal predecessors, (80), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:09:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2024-11-09 01:09:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 01:09:53,839 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:53,840 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:53,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 01:09:54,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 01:09:54,040 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:54,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:54,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1946862271, now seen corresponding path program 5 times [2024-11-09 01:09:54,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:54,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142542140] [2024-11-09 01:09:54,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:54,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 01:09:54,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:54,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142542140] [2024-11-09 01:09:54,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142542140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:54,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163766708] [2024-11-09 01:09:54,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:09:54,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:54,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:54,570 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:09:54,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 01:09:55,132 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 01:09:55,132 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:09:55,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-09 01:09:55,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:09:55,143 INFO L378 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 11 treesize of output 7 [2024-11-09 01:09:55,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 01:09:55,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:09:55,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2024-11-09 01:09:55,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:09:55,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-09 01:09:55,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:09:55,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-09 01:09:55,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:09:55,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-09 01:09:55,384 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:09:55,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 93 treesize of output 77 [2024-11-09 01:09:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 01:09:55,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:09:55,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163766708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:55,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1445794005] [2024-11-09 01:09:55,677 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:09:55,677 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:09:55,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:09:55,677 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:09:55,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:09:55,722 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:09:56,570 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:09:56,789 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:09:56,800 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:09:57,031 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:09:57,183 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:10:01,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3824#(and (<= 1 |#StackHeapBarrier|) (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_105 Int) (|v_old(#memory_int)_BEFORE_CALL_69| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_69| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| Int) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_69| (Array Int (Array Int Int)))) (or (and (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_69| 4) 8)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_69| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (exists ((|v_#valid_24| (Array Int Int))) (and (= (select |v_#valid_24| 1) 1) (= (store |v_#valid_24| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| 1) |#valid|) (= (select |v_#valid_24| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77|) 0) (= (select |v_#valid_24| 4) 1) (= (select |v_#valid_24| 0) 0) (= (select |v_#valid_24| 2) 1) (= (select |v_#valid_24| 3) 1))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_69| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_69| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_105) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_15 Int) (|v_aws_is_mem_zeroed_#t~mem42_105| Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_15 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_15 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_15 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_15) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_105| 256) 0)) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_15 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_15) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_15 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_15 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_105|)) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_15 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_15) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_15 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_15 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_105|))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_15 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_15 18446744073709551616)))) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_152| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_152|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_152| 18446744073709551616)))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_69| 1) 1) 0) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_69| 4) 16)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_69| 4) 24)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_69| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_69| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_69| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_69| 1) 0)) (exists ((|v_#length_14| (Array Int Int))) (and (= (select |v_#length_14| 3) 12) (= (store |v_#length_14| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| 16) |#length|) (= 2 (select |v_#length_14| 1)) (= (select |v_#length_14| 2) 37) (= 40 (select |v_#length_14| 4)))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_69| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|)) (and (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_69| 4) 8)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_69| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (exists ((|v_#valid_24| (Array Int Int))) (and (= (select |v_#valid_24| 1) 1) (= (store |v_#valid_24| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| 1) |#valid|) (= (select |v_#valid_24| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77|) 0) (= (select |v_#valid_24| 4) 1) (= (select |v_#valid_24| 0) 0) (= (select |v_#valid_24| 2) 1) (= (select |v_#valid_24| 3) 1))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_69| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_69| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_105) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_152| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_152|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_152| 18446744073709551616)))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_69| 1) 1) 0) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_16 Int) (|v_aws_is_mem_zeroed_#t~mem42_105| Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_16 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_16 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_16 Int)) (and (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_16 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_16) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_16 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_16 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_105|)) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_16 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_16) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_16 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_16 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_105|))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_16 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_16 18446744073709551616)) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_105| 256) 0)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_16))) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_69| 4) 16)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_69| 4) 24)) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_69| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_69| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_69| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_69| 1) 0)) (exists ((|v_#length_14| (Array Int Int))) (and (= (select |v_#length_14| 3) 12) (= (store |v_#length_14| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_77| 16) |#length|) (= 2 (select |v_#length_14| 1)) (= (select |v_#length_14| 2) 37) (= 40 (select |v_#length_14| 4)))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_69| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|)))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:10:01,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:10:01,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 01:10:01,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2024-11-09 01:10:01,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880130340] [2024-11-09 01:10:01,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 01:10:01,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 01:10:01,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 01:10:01,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1176, Unknown=1, NotChecked=0, Total=1260 [2024-11-09 01:10:01,806 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 01:10:02,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:02,569 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2024-11-09 01:10:02,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 01:10:02,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2024-11-09 01:10:02,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:02,571 INFO L225 Difference]: With dead ends: 113 [2024-11-09 01:10:02,571 INFO L226 Difference]: Without dead ends: 65 [2024-11-09 01:10:02,572 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=121, Invalid=1770, Unknown=1, NotChecked=0, Total=1892 [2024-11-09 01:10:02,573 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:02,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 417 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:10:02,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-09 01:10:02,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-11-09 01:10:02,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 51 states have internal predecessors, (59), 8 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-09 01:10:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2024-11-09 01:10:02,617 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 45 [2024-11-09 01:10:02,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:02,618 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2024-11-09 01:10:02,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 01:10:02,618 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2024-11-09 01:10:02,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 01:10:02,621 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:02,621 INFO L215 NwaCegarLoop]: trace histogram [8, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:02,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 01:10:02,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 01:10:02,822 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:02,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:02,822 INFO L85 PathProgramCache]: Analyzing trace with hash 538982861, now seen corresponding path program 6 times [2024-11-09 01:10:02,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:02,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104493046] [2024-11-09 01:10:02,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:02,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 01:10:03,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:03,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104493046] [2024-11-09 01:10:03,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104493046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:03,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188660567] [2024-11-09 01:10:03,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:10:03,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:03,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:03,362 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:03,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 01:10:03,719 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:10:03,720 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:10:03,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-09 01:10:03,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:03,801 INFO L378 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 11 treesize of output 7 [2024-11-09 01:10:03,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 01:10:03,870 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:03,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2024-11-09 01:10:03,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:03,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-09 01:10:03,973 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:03,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-09 01:10:04,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:04,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-09 01:10:04,134 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:04,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-09 01:10:04,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:04,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-09 01:10:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 01:10:04,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:10:17,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-09 01:10:17,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-11-09 01:10:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 76 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:17,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188660567] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:10:17,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [465844956] [2024-11-09 01:10:17,552 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:10:17,552 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:10:17,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:10:17,552 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:10:17,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:10:17,578 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:10:18,447 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:10:18,732 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:10:18,749 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:10:18,964 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:10:19,212 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:10:25,059 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4448#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_79| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_79| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| Int) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_120 Int) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_79| (Array Int (Array Int Int)))) (or (and (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_18 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_18 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_18 Int) (|v_aws_is_mem_zeroed_#t~mem42_128| Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_18 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_128| 256) 0)) (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_18) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_18 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_18 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_128|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_18 18446744073709551616))) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_18) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_18 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_18 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_128|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_18 18446744073709551616) 9223372036854775807))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_18 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_18 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_18))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_79| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_79| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_79| 4) 32) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_190| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_190| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_190|))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_79| 1) 0) 48) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_79| 4) 32) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_79| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_79| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_79| 4) 8)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_120) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_79| 4) 16)) (exists ((|v_#length_15| (Array Int Int))) (and (= (select |v_#length_15| 3) 12) (= 40 (select |v_#length_15| 4)) (= (select |v_#length_15| 2) 37) (= (select |v_#length_15| 1) 2) (= |#length| (store |v_#length_15| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 16)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_79| 4) 24)) (exists ((|v_#valid_25| (Array Int Int))) (and (= (select |v_#valid_25| 2) 1) (= (select |v_#valid_25| 1) 1) (= (select |v_#valid_25| 4) 1) (= (select |v_#valid_25| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) 0) (= (select |v_#valid_25| 0) 0) (= (store |v_#valid_25| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 1) |#valid|) (= (select |v_#valid_25| 3) 1))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_79| 4) 24)) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_79| 4) 0))) (and (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_79| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_79| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_79| 4) 32) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_190| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_190| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_190|))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_79| 1) 0) 48) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_79| 4) 32) 0) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_17 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_17 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_17 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_17 Int) (|v_aws_is_mem_zeroed_#t~mem42_128| Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_128| 256) 0)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_17) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_17 18446744073709551616) 9223372036854775807) (= |v_aws_is_mem_zeroed_#t~mem42_128| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_17) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_17 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_17 18446744073709551616))))) (and (= |v_aws_is_mem_zeroed_#t~mem42_128| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_17) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_17 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_17 18446744073709551616)))) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_17 18446744073709551616)))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_17 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_17 18446744073709551616)))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_79| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_79| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_79| 4) 8)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_120) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_79| 4) 16)) (exists ((|v_#length_15| (Array Int Int))) (and (= (select |v_#length_15| 3) 12) (= 40 (select |v_#length_15| 4)) (= (select |v_#length_15| 2) 37) (= (select |v_#length_15| 1) 2) (= |#length| (store |v_#length_15| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 16)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_79| 4) 24)) (exists ((|v_#valid_25| (Array Int Int))) (and (= (select |v_#valid_25| 2) 1) (= (select |v_#valid_25| 1) 1) (= (select |v_#valid_25| 4) 1) (= (select |v_#valid_25| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) 0) (= (select |v_#valid_25| 0) 0) (= (store |v_#valid_25| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87| 1) |#valid|) (= (select |v_#valid_25| 3) 1))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_87|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_79| 4) 24)) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_79| 4) 0))))) (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:10:25,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:10:25,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:10:25,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 23] total 46 [2024-11-09 01:10:25,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111008014] [2024-11-09 01:10:25,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:10:25,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 01:10:25,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 01:10:25,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=3436, Unknown=6, NotChecked=0, Total=3782 [2024-11-09 01:10:25,062 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 46 states, 40 states have (on average 1.9) internal successors, (76), 44 states have internal predecessors, (76), 5 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 01:10:28,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-09 01:10:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:30,173 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2024-11-09 01:10:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 01:10:30,174 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 1.9) internal successors, (76), 44 states have internal predecessors, (76), 5 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 46 [2024-11-09 01:10:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:30,175 INFO L225 Difference]: With dead ends: 125 [2024-11-09 01:10:30,175 INFO L226 Difference]: Without dead ends: 77 [2024-11-09 01:10:30,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=428, Invalid=4396, Unknown=6, NotChecked=0, Total=4830 [2024-11-09 01:10:30,177 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 19 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:30,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 587 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2024-11-09 01:10:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-09 01:10:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2024-11-09 01:10:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 55 states have internal predecessors, (65), 8 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-09 01:10:30,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2024-11-09 01:10:30,202 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 46 [2024-11-09 01:10:30,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:30,202 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2024-11-09 01:10:30,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 1.9) internal successors, (76), 44 states have internal predecessors, (76), 5 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 01:10:30,202 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2024-11-09 01:10:30,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 01:10:30,203 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:30,203 INFO L215 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:30,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 01:10:30,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 01:10:30,404 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:30,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:30,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1240555512, now seen corresponding path program 1 times [2024-11-09 01:10:30,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:30,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915020515] [2024-11-09 01:10:30,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:30,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 01:10:30,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:30,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915020515] [2024-11-09 01:10:30,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915020515] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:30,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604450957] [2024-11-09 01:10:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:30,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:30,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:30,921 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:30,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 01:10:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:31,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 01:10:31,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 01:10:31,288 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:10:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-09 01:10:31,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604450957] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:10:31,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [845708045] [2024-11-09 01:10:31,612 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-09 01:10:31,612 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:10:31,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:10:31,613 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:10:31,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:10:32,179 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:10:33,862 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:10:33,872 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 271 for LOIs [2024-11-09 01:10:34,724 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 20 for LOIs [2024-11-09 01:10:34,793 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:10:34,952 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:10:51,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5104#(and (<= 1 |#StackHeapBarrier|) (or (exists ((|v_ULTIMATE.start_aws_linked_list_node_reset_harness_#t~ret681#1_BEFORE_CALL_1| Int)) (and (= |__VERIFIER_assert_#in~cond| 0) (or (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_22 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_22 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_22 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_22 Int)) (and (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_22 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_22 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_22) (exists ((|v_aws_is_mem_zeroed_#t~mem42_149| Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_149| 256) 0)) (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_22) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_22 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_22 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_149|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_22 18446744073709551616) 9223372036854775807)) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_22 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_22) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_22 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_22 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_149|))))) (= |v_ULTIMATE.start_aws_linked_list_node_reset_harness_#t~ret681#1_BEFORE_CALL_1| 0))) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_21 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_21 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_21 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21) (exists ((|v_aws_is_mem_zeroed_#t~mem42_149| Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_149| 256) 0)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_21) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_21 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_149|)) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_21) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_21 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_149|))))) (= |v_ULTIMATE.start_aws_linked_list_node_reset_harness_#t~ret681#1_BEFORE_CALL_1| 0) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_21 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_21 18446744073709551616))))))) (exists ((|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_91| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_138 Int) (|v_aws_linked_list_node_reset_#t~ret298_BEFORE_CALL_23| Int) (|v_old(#memory_int)_BEFORE_CALL_91| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_91| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_105| Int)) (and (= |__VERIFIER_assert_#in~cond| 0) (or (and (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_105|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_91| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_91| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_105| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_138) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_91| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_91| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (exists ((|v_#length_16| (Array Int Int))) (and (= 40 (select |v_#length_16| 4)) (= |#length| (store |v_#length_16| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_105| 16)) (= 2 (select |v_#length_16| 1)) (= (select |v_#length_16| 2) 37) (= (select |v_#length_16| 3) 12))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_91| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (exists ((|v_#valid_26| (Array Int Int))) (and (= (select |v_#valid_26| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_105|) 0) (= (select |v_#valid_26| 4) 1) (= (store |v_#valid_26| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_105| 1) |#valid|) (= (select |v_#valid_26| 0) 0) (= (select |v_#valid_26| 3) 1) (= (select |v_#valid_26| 1) 1) (= (select |v_#valid_26| 2) 1))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_91| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_91| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_91| 4) 32) 0) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_24 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_24 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_24 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_24 Int)) (and (= |v_aws_linked_list_node_reset_#t~ret298_BEFORE_CALL_23| 0) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_24 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_24 18446744073709551616)) (exists ((|v_aws_is_mem_zeroed_#t~mem42_149| Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_149| 256) 0)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_24 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_24) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_24 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_24 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_149|)) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_24) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_24 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_24 18446744073709551616) (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_149|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_24 18446744073709551616)))))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_24))) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_223| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_223|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_223| 18446744073709551616)))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_91| 4) 32) 0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_91| 4) 24)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_91| 1) 0) 48) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_91| 4) 24))) (and (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_105|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_91| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_23 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_23 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_23 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_23 Int)) (and (= |v_aws_linked_list_node_reset_#t~ret298_BEFORE_CALL_23| 0) (<= (+ 1 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_23 18446744073709551616)) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_23 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_23) (exists ((|v_aws_is_mem_zeroed_#t~mem42_149| Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_149| 256) 0)) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_23 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_23) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_23 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_23 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_149|)) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_23 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_23) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_23 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_23 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_149|))))))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_91| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_105| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_138) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_91| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_91| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (exists ((|v_#length_16| (Array Int Int))) (and (= 40 (select |v_#length_16| 4)) (= |#length| (store |v_#length_16| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_105| 16)) (= 2 (select |v_#length_16| 1)) (= (select |v_#length_16| 2) 37) (= (select |v_#length_16| 3) 12))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_91| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (exists ((|v_#valid_26| (Array Int Int))) (and (= (select |v_#valid_26| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_105|) 0) (= (select |v_#valid_26| 4) 1) (= (store |v_#valid_26| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_105| 1) |#valid|) (= (select |v_#valid_26| 0) 0) (= (select |v_#valid_26| 3) 1) (= (select |v_#valid_26| 1) 1) (= (select |v_#valid_26| 2) 1))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_91| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_91| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_91| 4) 32) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_223| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_223|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_223| 18446744073709551616)))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_91| 4) 32) 0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_91| 4) 24)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_91| 1) 0) 48) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_91| 4) 24))))))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:10:51,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:10:51,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:10:51,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 6] total 24 [2024-11-09 01:10:51,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174196573] [2024-11-09 01:10:51,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:10:51,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 01:10:51,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:10:51,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 01:10:51,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1914, Unknown=4, NotChecked=0, Total=2070 [2024-11-09 01:10:51,312 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 24 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-09 01:10:52,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:52,496 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2024-11-09 01:10:52,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 01:10:52,497 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 24 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 51 [2024-11-09 01:10:52,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:52,498 INFO L225 Difference]: With dead ends: 135 [2024-11-09 01:10:52,499 INFO L226 Difference]: Without dead ends: 78 [2024-11-09 01:10:52,500 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=252, Invalid=3166, Unknown=4, NotChecked=0, Total=3422 [2024-11-09 01:10:52,501 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:52,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 392 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 01:10:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-09 01:10:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2024-11-09 01:10:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 56 states have internal predecessors, (62), 8 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-11-09 01:10:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2024-11-09 01:10:52,519 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 51 [2024-11-09 01:10:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:52,520 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2024-11-09 01:10:52,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 24 states have internal predecessors, (68), 2 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-09 01:10:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2024-11-09 01:10:52,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 01:10:52,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:52,521 INFO L215 NwaCegarLoop]: trace histogram [10, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:52,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 01:10:52,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 01:10:52,722 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:52,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:52,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1753696945, now seen corresponding path program 1 times [2024-11-09 01:10:52,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:52,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117720097] [2024-11-09 01:10:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:52,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-09 01:10:53,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:53,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117720097] [2024-11-09 01:10:53,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117720097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:53,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698227824] [2024-11-09 01:10:53,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:53,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:53,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:53,127 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:53,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 01:10:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:53,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 01:10:53,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 01:10:53,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:10:54,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-09 01:10:54,369 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-09 01:10:54,370 INFO L378 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 19 treesize of output 18 [2024-11-09 01:10:54,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:10:54,477 INFO L378 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 63 [2024-11-09 01:10:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-09 01:10:54,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698227824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:10:54,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [688134613] [2024-11-09 01:10:54,683 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 01:10:54,683 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:10:54,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:10:54,683 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:10:54,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:10:54,991 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:10:55,886 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:10:55,896 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:10:56,131 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:10:56,332 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:10:56,500 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:11:00,722 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5804#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_103| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_103| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_131| Int) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_162 Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_103| (Array Int (Array Int Int)))) (or (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_103| 1) 1) 0) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_103| 4) 16)) (= 0 (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_103| 4) 32)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_103| 4) 0)) (exists ((|v_aws_is_mem_zeroed_#t~mem42_177| Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_27 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_27 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_27 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_27 Int)) (and (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_27) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_27 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_27 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_177|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_27 18446744073709551616) 9223372036854775807)) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_27 18446744073709551616)) (= |v_aws_is_mem_zeroed_#t~mem42_177| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_27) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_27 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_27 18446744073709551616)))))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_177| 256) 0)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_27) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_27 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_27 18446744073709551616)))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_131|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_103| 4) 24)) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_257| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_257| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_257|))) (exists ((|v_#length_17| (Array Int Int))) (and (= 40 (select |v_#length_17| 4)) (= |#length| (store |v_#length_17| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_131| 16)) (= (select |v_#length_17| 2) 37) (= 12 (select |v_#length_17| 3)) (= 2 (select |v_#length_17| 1)))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_103| 4) 32) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_103| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_103| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_103| 4) 8)) (exists ((|v_#valid_27| (Array Int Int))) (and (= (select |v_#valid_27| 0) 0) (= (select |v_#valid_27| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_131|) 0) (= (select |v_#valid_27| 2) 1) (= (select |v_#valid_27| 1) 1) (= (store |v_#valid_27| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_131| 1) |#valid|) (= (select |v_#valid_27| 3) 1) (= (select |v_#valid_27| 4) 1))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_103| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_103| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_131| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_162) (= (select (select |v_old(#memory_int)_BEFORE_CALL_103| 1) 0) 48)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_103| 1) 1) 0) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_103| 4) 16)) (= 0 (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_103| 4) 32)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_103| 4) 0)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_131|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_103| 4) 24)) (exists ((|v_aws_is_mem_zeroed_#t~mem42_177| Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_28 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_28 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_28 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_28 Int)) (and (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_28 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_28 18446744073709551616)) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_177| 256) 0)) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_28 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_28) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_28 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_28 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_177|)) (and (= |v_aws_is_mem_zeroed_#t~mem42_177| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_28) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_28 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_28 18446744073709551616)))) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_28 18446744073709551616) 9223372036854775807))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_28))) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_257| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_257| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_257|))) (exists ((|v_#length_17| (Array Int Int))) (and (= 40 (select |v_#length_17| 4)) (= |#length| (store |v_#length_17| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_131| 16)) (= (select |v_#length_17| 2) 37) (= 12 (select |v_#length_17| 3)) (= 2 (select |v_#length_17| 1)))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_103| 4) 32) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_103| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_103| 4) 16) |#funAddr~s_can_fail_realloc_allocator.offset|) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_103| 4) 8)) (exists ((|v_#valid_27| (Array Int Int))) (and (= (select |v_#valid_27| 0) 0) (= (select |v_#valid_27| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_131|) 0) (= (select |v_#valid_27| 2) 1) (= (select |v_#valid_27| 1) 1) (= (store |v_#valid_27| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_131| 1) |#valid|) (= (select |v_#valid_27| 3) 1) (= (select |v_#valid_27| 4) 1))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_103| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_103| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_131| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_162) (= (select (select |v_old(#memory_int)_BEFORE_CALL_103| 1) 0) 48)))) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:11:00,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:11:00,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:11:00,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 11] total 24 [2024-11-09 01:11:00,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774091913] [2024-11-09 01:11:00,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:11:00,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 01:11:00,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:11:00,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 01:11:00,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1431, Unknown=1, NotChecked=0, Total=1560 [2024-11-09 01:11:00,725 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 24 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 8 states have call successors, (15), 4 states have call predecessors, (15), 9 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-09 01:11:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:11:01,812 INFO L93 Difference]: Finished difference Result 151 states and 172 transitions. [2024-11-09 01:11:01,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 01:11:01,812 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 8 states have call successors, (15), 4 states have call predecessors, (15), 9 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 53 [2024-11-09 01:11:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:11:01,813 INFO L225 Difference]: With dead ends: 151 [2024-11-09 01:11:01,814 INFO L226 Difference]: Without dead ends: 96 [2024-11-09 01:11:01,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=237, Invalid=2732, Unknown=1, NotChecked=0, Total=2970 [2024-11-09 01:11:01,815 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 01:11:01,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 371 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 01:11:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-09 01:11:01,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 73. [2024-11-09 01:11:01,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 states have internal predecessors, (61), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 01:11:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2024-11-09 01:11:01,837 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 53 [2024-11-09 01:11:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:11:01,838 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2024-11-09 01:11:01,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 8 states have call successors, (15), 4 states have call predecessors, (15), 9 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-09 01:11:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2024-11-09 01:11:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 01:11:01,838 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:11:01,839 INFO L215 NwaCegarLoop]: trace histogram [10, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:11:01,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 01:11:02,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 01:11:02,039 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:11:02,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:11:02,040 INFO L85 PathProgramCache]: Analyzing trace with hash 623938219, now seen corresponding path program 7 times [2024-11-09 01:11:02,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:11:02,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954507474] [2024-11-09 01:11:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:11:02,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:11:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:11:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 01:11:02,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:11:02,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954507474] [2024-11-09 01:11:02,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954507474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:11:02,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387326763] [2024-11-09 01:11:02,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:11:02,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:11:02,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:11:02,636 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:11:02,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 01:11:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:11:03,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-09 01:11:03,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:11:03,274 INFO L378 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 11 treesize of output 7 [2024-11-09 01:11:03,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 01:11:03,350 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:11:03,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2024-11-09 01:11:03,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:11:03,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-09 01:11:03,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:11:03,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-09 01:11:03,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:11:03,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-09 01:11:03,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:11:03,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-09 01:11:03,828 INFO L349 Elim1Store]: treesize reduction 124, result has 33.3 percent of original size [2024-11-09 01:11:03,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 92 [2024-11-09 01:11:04,081 INFO L349 Elim1Store]: treesize reduction 198, result has 26.4 percent of original size [2024-11-09 01:11:04,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 84 treesize of output 104 [2024-11-09 01:11:04,362 INFO L349 Elim1Store]: treesize reduction 280, result has 22.2 percent of original size [2024-11-09 01:11:04,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 93 treesize of output 116 [2024-11-09 01:11:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 3 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:11:20,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:11:25,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 57 [2024-11-09 01:11:27,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2024-11-09 01:11:27,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2024-11-09 01:11:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 39 proven. 73 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:11:27,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387326763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:11:27,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912954360] [2024-11-09 01:11:27,298 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:11:27,298 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:11:27,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:11:27,299 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:11:27,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:11:27,328 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:11:28,125 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:11:28,340 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:11:28,352 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:11:28,641 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:11:28,963 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:11:37,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6550#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_113| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_113| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_141| Int) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_178 Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_113| (Array Int (Array Int Int)))) (or (and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_113| 4) 16)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_113| 1) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_113| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_141|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_113| 4) 32) 0) (exists ((|v_#valid_28| (Array Int Int))) (and (= (select |v_#valid_28| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_141|) 0) (= (select |v_#valid_28| 3) 1) (= (select |v_#valid_28| 1) 1) (= (select |v_#valid_28| 2) 1) (= (select |v_#valid_28| 0) 0) (= |#valid| (store |v_#valid_28| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_141| 1)) (= (select |v_#valid_28| 4) 1))) (exists ((|v_#length_18| (Array Int Int))) (and (= 12 (select |v_#length_18| 3)) (= 40 (select |v_#length_18| 4)) (= (store |v_#length_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_141| 16) |#length|) (= 2 (select |v_#length_18| 1)) (= (select |v_#length_18| 2) 37))) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_113| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_113| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_113| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_113| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_141| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_178) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_30 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_30 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_30 Int) (|v_aws_is_mem_zeroed_#t~mem42_203| Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_30 Int)) (and (<= (+ 1 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_30 18446744073709551616)) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_30 18446744073709551616)) (or (and (= |v_aws_is_mem_zeroed_#t~mem42_203| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_30) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_30 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_30 18446744073709551616)))) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_30 18446744073709551616))) (and (= |v_aws_is_mem_zeroed_#t~mem42_203| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_30) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_30 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_30 18446744073709551616)))) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_30 18446744073709551616) 9223372036854775807))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_30) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_203| 256) 0)))) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_307| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_307|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_307| 18446744073709551616)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_113| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_113| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_113| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_113| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|)) (and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_113| 4) 16)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_113| 1) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_113| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_141|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_113| 4) 32) 0) (exists ((|v_#valid_28| (Array Int Int))) (and (= (select |v_#valid_28| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_141|) 0) (= (select |v_#valid_28| 3) 1) (= (select |v_#valid_28| 1) 1) (= (select |v_#valid_28| 2) 1) (= (select |v_#valid_28| 0) 0) (= |#valid| (store |v_#valid_28| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_141| 1)) (= (select |v_#valid_28| 4) 1))) (exists ((|v_#length_18| (Array Int Int))) (and (= 12 (select |v_#length_18| 3)) (= 40 (select |v_#length_18| 4)) (= (store |v_#length_18| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_141| 16) |#length|) (= 2 (select |v_#length_18| 1)) (= (select |v_#length_18| 2) 37))) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_113| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_113| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_113| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_113| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_141| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_178) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_307| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_307|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_307| 18446744073709551616)))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_113| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_113| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_29 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_29 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_29 Int) (|v_aws_is_mem_zeroed_#t~mem42_203| Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_29 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_29) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_29 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_29 18446744073709551616)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_29 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_29) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_29 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_29 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_203|)) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_29) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_29 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_29 18446744073709551616) (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_203|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_29 18446744073709551616)))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_203| 256) 0)))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_113| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_113| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|)))) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:11:37,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:11:37,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:11:37,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 28, 22] total 59 [2024-11-09 01:11:37,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763039550] [2024-11-09 01:11:37,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:11:37,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-09 01:11:37,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:11:37,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-09 01:11:37,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=5233, Unknown=7, NotChecked=0, Total=5550 [2024-11-09 01:11:37,491 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 59 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 56 states have internal predecessors, (102), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:11:51,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:11:53,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:11:58,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:12:01,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:12:03,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:12:05,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:12:08,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:12:11,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:12:13,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:12:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:12:13,933 INFO L93 Difference]: Finished difference Result 163 states and 177 transitions. [2024-11-09 01:12:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-09 01:12:13,934 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 56 states have internal predecessors, (102), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 51 [2024-11-09 01:12:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:12:13,935 INFO L225 Difference]: With dead ends: 163 [2024-11-09 01:12:13,936 INFO L226 Difference]: Without dead ends: 107 [2024-11-09 01:12:13,938 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=447, Invalid=7022, Unknown=13, NotChecked=0, Total=7482 [2024-11-09 01:12:13,939 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 10 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2024-11-09 01:12:13,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 507 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1353 Invalid, 9 Unknown, 0 Unchecked, 21.7s Time] [2024-11-09 01:12:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-09 01:12:13,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2024-11-09 01:12:13,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 62 states have internal predecessors, (66), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 01:12:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2024-11-09 01:12:13,984 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 51 [2024-11-09 01:12:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:12:13,984 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2024-11-09 01:12:13,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 56 states have internal predecessors, (102), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:12:13,985 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2024-11-09 01:12:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 01:12:13,985 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:12:13,986 INFO L215 NwaCegarLoop]: trace histogram [11, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:12:14,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 01:12:14,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 01:12:14,190 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:12:14,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:12:14,191 INFO L85 PathProgramCache]: Analyzing trace with hash 155366529, now seen corresponding path program 8 times [2024-11-09 01:12:14,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:12:14,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897238557] [2024-11-09 01:12:14,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:12:14,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:12:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:12:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 01:12:15,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:12:15,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897238557] [2024-11-09 01:12:15,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897238557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:12:15,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155384312] [2024-11-09 01:12:15,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:12:15,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:12:15,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:12:15,137 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:12:15,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 01:12:18,126 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 01:12:18,126 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:12:18,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-09 01:12:18,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:12:18,260 INFO L378 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 11 treesize of output 7 [2024-11-09 01:12:18,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 01:12:18,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:18,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2024-11-09 01:12:18,436 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:18,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-09 01:12:18,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:18,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-09 01:12:18,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:18,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-09 01:12:18,719 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:18,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-09 01:12:18,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:18,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-09 01:12:18,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:18,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-09 01:12:19,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:19,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-09 01:12:19,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:19,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-09 01:12:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 01:12:19,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:12:20,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155384312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:12:20,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1365015726] [2024-11-09 01:12:20,136 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:12:20,136 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:12:20,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:12:20,137 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:12:20,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:12:20,175 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:12:21,317 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:12:21,598 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:12:21,611 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:12:21,976 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:12:22,267 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:12:29,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7169#(and (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_190 Int) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_151| Int) (|v_old(#memory_int)_BEFORE_CALL_123| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_123| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_123| (Array Int (Array Int Int)))) (or (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_123| 1) 0) 48) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_327| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_327| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_327|))) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_123| 4) 16)) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_123| 4) 16)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_123| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_123| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_123| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_151| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_190) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_123| 4) 24)) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_31 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_31 Int) (|v_aws_is_mem_zeroed_#t~mem42_222| Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_31 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_31 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_31) (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_31) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_31 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_31 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_222|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_31 18446744073709551616) 9223372036854775807)) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_31 18446744073709551616)) (= |v_aws_is_mem_zeroed_#t~mem42_222| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_31) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_31 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_31 18446744073709551616) (- 18446744073709551616)))))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_222| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_31 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_31 18446744073709551616)))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_123| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_123| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_123| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#length_19| (Array Int Int))) (and (= (select |v_#length_19| 1) 2) (= 40 (select |v_#length_19| 4)) (= 12 (select |v_#length_19| 3)) (= (select |v_#length_19| 2) 37) (= (store |v_#length_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_151| 16) |#length|))) (exists ((|v_#valid_29| (Array Int Int))) (and (= (select |v_#valid_29| 2) 1) (= (select |v_#valid_29| 3) 1) (= (select |v_#valid_29| 1) 1) (= (select |v_#valid_29| 4) 1) (= (store |v_#valid_29| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_151| 1) |#valid|) (= (select |v_#valid_29| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_151|) 0) (= (select |v_#valid_29| 0) 0))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_151|) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_123| 4) 8)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_123| 1) 1) 0)) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_123| 1) 0) 48) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_327| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_327| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_327|))) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_123| 4) 16)) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_123| 4) 16)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_123| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_123| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_123| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_151| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_190) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_123| 4) 24)) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_32 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_32 Int) (|v_aws_is_mem_zeroed_#t~mem42_222| Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_32 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_32 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_32) (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_32) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_32 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_32 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_222|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_32 18446744073709551616))) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_32 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_32) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_32 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_32 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_222|))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_222| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_32 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_32 18446744073709551616)))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_123| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_123| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_123| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#length_19| (Array Int Int))) (and (= (select |v_#length_19| 1) 2) (= 40 (select |v_#length_19| 4)) (= 12 (select |v_#length_19| 3)) (= (select |v_#length_19| 2) 37) (= (store |v_#length_19| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_151| 16) |#length|))) (exists ((|v_#valid_29| (Array Int Int))) (and (= (select |v_#valid_29| 2) 1) (= (select |v_#valid_29| 3) 1) (= (select |v_#valid_29| 1) 1) (= (select |v_#valid_29| 4) 1) (= (store |v_#valid_29| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_151| 1) |#valid|) (= (select |v_#valid_29| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_151|) 0) (= (select |v_#valid_29| 0) 0))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_151|) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_123| 4) 8)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_123| 1) 1) 0)))) (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:12:29,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:12:29,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 01:12:29,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2024-11-09 01:12:29,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400125219] [2024-11-09 01:12:29,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 01:12:29,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 01:12:29,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:12:29,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 01:12:29,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2423, Unknown=1, NotChecked=0, Total=2550 [2024-11-09 01:12:29,455 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 31 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 30 states have internal predecessors, (48), 4 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 01:12:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:12:31,808 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2024-11-09 01:12:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 01:12:31,809 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 30 states have internal predecessors, (48), 4 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2024-11-09 01:12:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:12:31,810 INFO L225 Difference]: With dead ends: 135 [2024-11-09 01:12:31,811 INFO L226 Difference]: Without dead ends: 78 [2024-11-09 01:12:31,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=191, Invalid=3840, Unknown=1, NotChecked=0, Total=4032 [2024-11-09 01:12:31,813 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:12:31,813 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 738 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 01:12:31,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-09 01:12:31,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-09 01:12:31,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 63 states have internal predecessors, (67), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 01:12:31,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2024-11-09 01:12:31,840 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 55 [2024-11-09 01:12:31,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:12:31,840 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2024-11-09 01:12:31,841 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 30 states have internal predecessors, (48), 4 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 01:12:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2024-11-09 01:12:31,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-09 01:12:31,841 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:12:31,841 INFO L215 NwaCegarLoop]: trace histogram [12, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:12:31,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 01:12:32,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 01:12:32,042 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:12:32,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:12:32,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2113171981, now seen corresponding path program 9 times [2024-11-09 01:12:32,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:12:32,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764059384] [2024-11-09 01:12:32,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:12:32,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:12:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:12:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-11-09 01:12:32,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:12:32,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764059384] [2024-11-09 01:12:32,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764059384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:12:32,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370678403] [2024-11-09 01:12:32,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:12:32,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:12:32,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:12:32,965 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:12:32,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 01:12:33,795 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:12:33,795 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:12:33,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-09 01:12:33,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:12:33,929 INFO L378 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 11 treesize of output 7 [2024-11-09 01:12:33,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 01:12:34,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:34,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2024-11-09 01:12:34,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:34,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-09 01:12:34,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:34,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-09 01:12:34,267 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:34,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-09 01:12:34,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:34,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-09 01:12:34,484 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:34,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-09 01:12:34,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:34,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-09 01:12:34,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:34,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-09 01:12:34,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:34,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-09 01:12:35,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:12:35,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-11-09 01:12:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:12:39,541 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:12:49,505 WARN L286 SmtUtils]: Spent 7.51s on a formula simplification. DAG size of input: 143 DAG size of output: 140 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-11-09 01:12:52,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 80 [2024-11-09 01:12:52,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 129 [2024-11-09 01:12:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:12:52,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370678403] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:12:52,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1995414496] [2024-11-09 01:12:52,911 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:12:52,912 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:12:52,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:12:52,912 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:12:52,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:12:52,955 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:12:53,905 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:12:54,182 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:12:54,194 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:12:54,430 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:12:54,614 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:13:03,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7940#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0) (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_206 Int) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_161| Int) (|v_old(#memory_int)_BEFORE_CALL_133| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_133| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_133| (Array Int (Array Int Int)))) (or (and (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_161| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_206) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_133| 4) 8)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_133| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_133| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_374| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_374|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_374| 18446744073709551616)))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_133| 1) 0) 48) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_133| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (exists ((|v_#length_20| (Array Int Int))) (and (= |#length| (store |v_#length_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_161| 16)) (= 2 (select |v_#length_20| 1)) (= 40 (select |v_#length_20| 4)) (= (select |v_#length_20| 2) 37) (= (select |v_#length_20| 3) 12))) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_133| 4) 16)) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_133| 4) 24)) (exists ((|v_#valid_30| (Array Int Int))) (and (= (select |v_#valid_30| 2) 1) (= (select |v_#valid_30| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_161|) 0) (= (select |v_#valid_30| 0) 0) (= 1 (select |v_#valid_30| 4)) (= (select |v_#valid_30| 1) 1) (= (select |v_#valid_30| 3) 1) (= (store |v_#valid_30| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_161| 1) |#valid|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_133| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_133| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_161|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_133| 4) 32) 0) (exists ((|v_aws_is_mem_zeroed_#t~mem42_250| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_33 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_33 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_33 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_33 Int)) (and (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_33) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_33 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_33 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_250|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_33 18446744073709551616) 9223372036854775807)) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_33) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_33 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_33 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_250|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_33 18446744073709551616)))) (not (= 0 (mod |v_aws_is_mem_zeroed_#t~mem42_250| 256))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_33 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_33 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_33))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_133| 1) 1) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_133| 4) 24))) (and (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_161| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_206) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_133| 4) 8)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_133| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_133| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_374| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_374|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_374| 18446744073709551616)))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_133| 1) 0) 48) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_133| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (exists ((|v_#length_20| (Array Int Int))) (and (= |#length| (store |v_#length_20| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_161| 16)) (= 2 (select |v_#length_20| 1)) (= 40 (select |v_#length_20| 4)) (= (select |v_#length_20| 2) 37) (= (select |v_#length_20| 3) 12))) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_133| 4) 16)) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_133| 4) 24)) (exists ((|v_#valid_30| (Array Int Int))) (and (= (select |v_#valid_30| 2) 1) (= (select |v_#valid_30| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_161|) 0) (= (select |v_#valid_30| 0) 0) (= 1 (select |v_#valid_30| 4)) (= (select |v_#valid_30| 1) 1) (= (select |v_#valid_30| 3) 1) (= (store |v_#valid_30| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_161| 1) |#valid|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_133| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_133| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_161|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_133| 4) 32) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_133| 1) 1) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_133| 4) 24)) (exists ((|v_aws_is_mem_zeroed_#t~mem42_250| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_34 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_34 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_34 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_34 Int)) (and (or (and (= |v_aws_is_mem_zeroed_#t~mem42_250| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_34) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_34 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_34 18446744073709551616)))) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_34 18446744073709551616) 9223372036854775807)) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_34 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_34) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_34 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_34 18446744073709551616) (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_250|))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_34) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_34 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_34 18446744073709551616)) (not (= 0 (mod |v_aws_is_mem_zeroed_#t~mem42_250| 256)))))))))' at error location [2024-11-09 01:13:03,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:13:03,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:13:03,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 31, 28] total 70 [2024-11-09 01:13:03,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144434401] [2024-11-09 01:13:03,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:13:03,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-09 01:13:03,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:13:03,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-09 01:13:03,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=6863, Unknown=1, NotChecked=0, Total=7310 [2024-11-09 01:13:03,095 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 70 states, 66 states have (on average 1.7575757575757576) internal successors, (116), 67 states have internal predecessors, (116), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:13:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:13:08,584 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2024-11-09 01:13:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 01:13:08,585 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 66 states have (on average 1.7575757575757576) internal successors, (116), 67 states have internal predecessors, (116), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 56 [2024-11-09 01:13:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:13:08,586 INFO L225 Difference]: With dead ends: 176 [2024-11-09 01:13:08,587 INFO L226 Difference]: Without dead ends: 117 [2024-11-09 01:13:08,587 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=532, Invalid=8023, Unknown=1, NotChecked=0, Total=8556 [2024-11-09 01:13:08,588 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:13:08,588 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 953 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2159 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-09 01:13:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-09 01:13:08,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 82. [2024-11-09 01:13:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 67 states have internal predecessors, (72), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 01:13:08,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2024-11-09 01:13:08,631 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 56 [2024-11-09 01:13:08,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:13:08,632 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2024-11-09 01:13:08,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 66 states have (on average 1.7575757575757576) internal successors, (116), 67 states have internal predecessors, (116), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:13:08,632 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2024-11-09 01:13:08,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 01:13:08,633 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:13:08,633 INFO L215 NwaCegarLoop]: trace histogram [13, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:13:08,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 01:13:08,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 01:13:08,834 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:13:08,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:13:08,834 INFO L85 PathProgramCache]: Analyzing trace with hash -2089570185, now seen corresponding path program 10 times [2024-11-09 01:13:08,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:13:08,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744341632] [2024-11-09 01:13:08,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:13:08,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:13:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:13:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-09 01:13:09,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:13:09,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744341632] [2024-11-09 01:13:09,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744341632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:13:09,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946793971] [2024-11-09 01:13:09,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:13:09,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:13:09,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:13:09,782 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:13:09,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 01:13:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:13:10,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-09 01:13:10,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:13:10,605 INFO L378 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 11 treesize of output 7 [2024-11-09 01:13:10,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 01:13:10,690 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:10,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2024-11-09 01:13:10,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:10,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-09 01:13:10,817 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:10,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-09 01:13:10,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:10,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-09 01:13:10,995 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:10,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-09 01:13:11,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:11,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-09 01:13:11,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:11,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-09 01:13:11,352 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:11,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-09 01:13:11,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:11,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-09 01:13:11,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:11,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-11-09 01:13:11,836 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:11,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2024-11-09 01:13:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:13:17,154 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:13:29,717 WARN L286 SmtUtils]: Spent 10.05s on a formula simplification. DAG size of input: 149 DAG size of output: 147 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-11-09 01:13:33,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 86 [2024-11-09 01:13:33,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 138 [2024-11-09 01:13:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 78 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:13:33,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946793971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:13:33,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [635378990] [2024-11-09 01:13:33,447 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:13:33,448 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:13:33,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:13:33,448 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:13:33,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:13:33,505 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:13:34,497 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:13:34,771 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:13:34,784 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:13:35,048 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:13:35,259 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:13:44,202 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8791#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_171| Int) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_222 Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_143| (Array Int (Array Int Int))) (|v_old(#memory_int)_BEFORE_CALL_143| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_143| (Array Int (Array Int Int)))) (or (and (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_143| 4) 16)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_171| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_222) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_171|) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_36 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_36 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_36 Int) (|v_aws_is_mem_zeroed_#t~mem42_280| Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_36 Int)) (and (or (and (= |v_aws_is_mem_zeroed_#t~mem42_280| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_36) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_36 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_36))) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_36 18446744073709551616) 9223372036854775807)) (and (= |v_aws_is_mem_zeroed_#t~mem42_280| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_36) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_36 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_36 (- 18446744073709551616)))) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_36 18446744073709551616)))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_36 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_36 18446744073709551616)) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_280| 256) 0)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_36))) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_143| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_143| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_143| 4) 0)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_143| 4) 16)) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_143| 4) 8)) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_424| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_424| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_424|))) (exists ((|v_#valid_31| (Array Int Int))) (and (= (store |v_#valid_31| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_171| 1) |#valid|) (= (select |v_#valid_31| 4) 1) (= (select |v_#valid_31| 0) 0) (= (select |v_#valid_31| 2) 1) (= (select |v_#valid_31| 1) 1) (= (select |v_#valid_31| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_171|) 0) (= (select |v_#valid_31| 3) 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_143| 1) 0) 48) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_143| 4) 0)) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_143| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_143| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_143| 4) 32) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_143| 1) 1) 0) (exists ((|v_#length_21| (Array Int Int))) (and (= 2 (select |v_#length_21| 1)) (= (select |v_#length_21| 2) 37) (= (store |v_#length_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_171| 16) |#length|) (= 12 (select |v_#length_21| 3)) (= 40 (select |v_#length_21| 4))))) (and (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_143| 4) 16)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_171| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_222) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_171|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_143| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_143| 4) 32) 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_143| 4) 0)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_143| 4) 16)) (= |#funAddr~s_can_fail_free_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_143| 4) 8)) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_35 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_35 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_35 Int) (|v_aws_is_mem_zeroed_#t~mem42_280| Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_35 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_280| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_35 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_35 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_35) (or (and (= |v_aws_is_mem_zeroed_#t~mem42_280| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_35) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_35 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_35 18446744073709551616)))) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_35 18446744073709551616) 9223372036854775807)) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_35) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_35 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_35 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_280|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_35 18446744073709551616)))))) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_424| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_424| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_424|))) (exists ((|v_#valid_31| (Array Int Int))) (and (= (store |v_#valid_31| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_171| 1) |#valid|) (= (select |v_#valid_31| 4) 1) (= (select |v_#valid_31| 0) 0) (= (select |v_#valid_31| 2) 1) (= (select |v_#valid_31| 1) 1) (= (select |v_#valid_31| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_171|) 0) (= (select |v_#valid_31| 3) 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_143| 1) 0) 48) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_143| 4) 0)) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_143| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_143| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_143| 4) 32) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_143| 1) 1) 0) (exists ((|v_#length_21| (Array Int Int))) (and (= 2 (select |v_#length_21| 1)) (= (select |v_#length_21| 2) 37) (= (store |v_#length_21| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_171| 16) |#length|) (= 12 (select |v_#length_21| 3)) (= 40 (select |v_#length_21| 4))))))) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:13:44,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:13:44,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:13:44,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 33, 30] total 75 [2024-11-09 01:13:44,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182330663] [2024-11-09 01:13:44,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:13:44,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-09 01:13:44,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:13:44,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-09 01:13:44,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=7674, Unknown=1, NotChecked=0, Total=8190 [2024-11-09 01:13:44,205 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 75 states, 71 states have (on average 1.7605633802816902) internal successors, (125), 72 states have internal predecessors, (125), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:13:49,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:13:49,723 INFO L93 Difference]: Finished difference Result 188 states and 208 transitions. [2024-11-09 01:13:49,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-09 01:13:49,724 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 71 states have (on average 1.7605633802816902) internal successors, (125), 72 states have internal predecessors, (125), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 60 [2024-11-09 01:13:49,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:13:49,725 INFO L225 Difference]: With dead ends: 188 [2024-11-09 01:13:49,725 INFO L226 Difference]: Without dead ends: 126 [2024-11-09 01:13:49,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=605, Invalid=8900, Unknown=1, NotChecked=0, Total=9506 [2024-11-09 01:13:49,727 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 53 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 2174 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:13:49,727 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 936 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2174 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-09 01:13:49,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-09 01:13:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 86. [2024-11-09 01:13:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 70 states have (on average 1.1) internal successors, (77), 71 states have internal predecessors, (77), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 01:13:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2024-11-09 01:13:49,789 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 60 [2024-11-09 01:13:49,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:13:49,789 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2024-11-09 01:13:49,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 71 states have (on average 1.7605633802816902) internal successors, (125), 72 states have internal predecessors, (125), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:13:49,790 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2024-11-09 01:13:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-09 01:13:49,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:13:49,790 INFO L215 NwaCegarLoop]: trace histogram [14, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:13:49,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 01:13:49,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 01:13:49,991 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:13:49,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:13:49,991 INFO L85 PathProgramCache]: Analyzing trace with hash -507167795, now seen corresponding path program 11 times [2024-11-09 01:13:49,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:13:49,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600352393] [2024-11-09 01:13:49,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:13:49,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:13:50,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:13:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-09 01:13:51,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:13:51,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600352393] [2024-11-09 01:13:51,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600352393] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:13:51,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215865147] [2024-11-09 01:13:51,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:13:51,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:13:51,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:13:51,052 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:13:51,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 01:13:54,153 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-09 01:13:54,153 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:13:54,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-09 01:13:54,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:13:54,255 INFO L378 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 11 treesize of output 7 [2024-11-09 01:13:54,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 01:13:54,350 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:54,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2024-11-09 01:13:54,417 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:54,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-09 01:13:54,494 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:54,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-09 01:13:54,583 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:54,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-09 01:13:54,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:54,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-09 01:13:54,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:54,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-09 01:13:54,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:54,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-09 01:13:55,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:55,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-09 01:13:55,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:55,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-09 01:13:55,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:55,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-11-09 01:13:55,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:55,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2024-11-09 01:13:55,872 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:13:55,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 129 treesize of output 164 [2024-11-09 01:13:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-09 01:13:56,328 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:13:56,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215865147] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:13:56,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567091346] [2024-11-09 01:13:56,654 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:13:56,654 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:13:56,654 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:13:56,655 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:13:56,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:13:56,696 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:13:57,721 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:13:58,009 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:13:58,022 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:13:58,280 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:13:58,504 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:14:05,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9477#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0) (exists ((|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_181| Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_153| (Array Int (Array Int Int))) (|v_old(#memory_int)_BEFORE_CALL_153| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_153| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_232 Int)) (or (and (exists ((|v_#length_22| (Array Int Int))) (and (= (select |v_#length_22| 1) 2) (= |#length| (store |v_#length_22| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_181| 16)) (= (select |v_#length_22| 3) 12) (= 40 (select |v_#length_22| 4)) (= (select |v_#length_22| 2) 37))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_181|) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_153| 4) 16)) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_37 Int) (|v_aws_is_mem_zeroed_#t~mem42_301| Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_37 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_37 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_37 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_37) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_301| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_37 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_37 18446744073709551616)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_37 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_37) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_37 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_37 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_301|)) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_37) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_37 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_37 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_301|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_37 18446744073709551616)))))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_153| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_153| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_153| 4) 0)) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_153| 4) 24)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_181| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_232) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_153| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_153| 4) 0)) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_447| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_447| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_447|))) (exists ((|v_#valid_32| (Array Int Int))) (and (= (select |v_#valid_32| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_181|) 0) (= (select |v_#valid_32| 1) 1) (= (select |v_#valid_32| 2) 1) (= (select |v_#valid_32| 0) 0) (= (select |v_#valid_32| 4) 1) (= (store |v_#valid_32| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_181| 1) |#valid|) (= (select |v_#valid_32| 3) 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_153| 1) 0) 48) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_153| 4) 32) 0) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_153| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_153| 4) 32) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_153| 4) 24))) (and (exists ((|v_#length_22| (Array Int Int))) (and (= (select |v_#length_22| 1) 2) (= |#length| (store |v_#length_22| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_181| 16)) (= (select |v_#length_22| 3) 12) (= 40 (select |v_#length_22| 4)) (= (select |v_#length_22| 2) 37))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_181|) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_153| 4) 16)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_153| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_153| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_153| 4) 0)) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_153| 4) 24)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_181| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_232) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_153| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_153| 4) 0)) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_447| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_447| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_447|))) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_38 Int) (|v_aws_is_mem_zeroed_#t~mem42_301| Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_38 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_38 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_38 Int)) (and (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_38 18446744073709551616)) (= |v_aws_is_mem_zeroed_#t~mem42_301| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_38) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_38 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_38 18446744073709551616))))) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_38 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_38) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_38 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_38 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_301|))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_301| 256) 0)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_38) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_38 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_38 18446744073709551616)))) (exists ((|v_#valid_32| (Array Int Int))) (and (= (select |v_#valid_32| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_181|) 0) (= (select |v_#valid_32| 1) 1) (= (select |v_#valid_32| 2) 1) (= (select |v_#valid_32| 0) 0) (= (select |v_#valid_32| 4) 1) (= (store |v_#valid_32| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_181| 1) |#valid|) (= (select |v_#valid_32| 3) 1))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_153| 1) 0) 48) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_153| 4) 32) 0) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_153| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_153| 4) 32) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_153| 4) 24))))))' at error location [2024-11-09 01:14:05,416 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:14:05,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 01:14:05,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 36 [2024-11-09 01:14:05,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823378825] [2024-11-09 01:14:05,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 01:14:05,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 01:14:05,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:05,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 01:14:05,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2566, Unknown=1, NotChecked=0, Total=2756 [2024-11-09 01:14:05,418 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 36 states, 32 states have (on average 1.65625) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 01:14:06,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:06,577 INFO L93 Difference]: Finished difference Result 150 states and 162 transitions. [2024-11-09 01:14:06,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 01:14:06,578 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.65625) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 64 [2024-11-09 01:14:06,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:06,579 INFO L225 Difference]: With dead ends: 150 [2024-11-09 01:14:06,580 INFO L226 Difference]: Without dead ends: 87 [2024-11-09 01:14:06,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=196, Invalid=2665, Unknown=1, NotChecked=0, Total=2862 [2024-11-09 01:14:06,581 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:06,582 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 587 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 01:14:06,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-09 01:14:06,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-09 01:14:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 72 states have internal predecessors, (78), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 01:14:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2024-11-09 01:14:06,655 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 64 [2024-11-09 01:14:06,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:06,655 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2024-11-09 01:14:06,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.65625) internal successors, (53), 35 states have internal predecessors, (53), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 01:14:06,655 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2024-11-09 01:14:06,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-09 01:14:06,656 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:06,657 INFO L215 NwaCegarLoop]: trace histogram [15, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:14:06,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 01:14:06,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:06,858 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:06,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:06,858 INFO L85 PathProgramCache]: Analyzing trace with hash -186516543, now seen corresponding path program 12 times [2024-11-09 01:14:06,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:06,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180211733] [2024-11-09 01:14:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:06,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2024-11-09 01:14:08,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:08,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180211733] [2024-11-09 01:14:08,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180211733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:08,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860547742] [2024-11-09 01:14:08,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:14:08,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:08,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:08,255 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:08,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 01:14:09,207 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:14:09,207 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:14:09,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 115 conjuncts are in the unsatisfiable core [2024-11-09 01:14:09,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:09,311 INFO L378 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 11 treesize of output 7 [2024-11-09 01:14:09,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 01:14:09,382 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:09,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2024-11-09 01:14:09,433 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:09,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-09 01:14:09,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:09,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-09 01:14:09,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:09,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-09 01:14:09,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:09,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-09 01:14:09,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:09,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-09 01:14:09,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:09,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-09 01:14:09,954 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:09,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-09 01:14:10,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:10,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-09 01:14:10,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:10,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-11-09 01:14:10,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:10,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2024-11-09 01:14:10,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:10,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 129 treesize of output 164 [2024-11-09 01:14:10,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:14:10,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 176 [2024-11-09 01:14:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:17,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:14:41,031 WARN L286 SmtUtils]: Spent 20.27s on a formula simplification. DAG size of input: 176 DAG size of output: 173 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-11-09 01:14:46,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 98 [2024-11-09 01:14:46,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 160 [2024-11-09 01:14:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 69 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:46,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860547742] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:14:46,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1198243115] [2024-11-09 01:14:46,757 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:14:46,757 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:14:46,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:14:46,758 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:14:46,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:14:46,789 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:14:47,759 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:14:48,068 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:14:48,081 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:14:48,360 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:14:48,586 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:14:58,196 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10327#(and (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_248 Int) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_191| Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_163| (Array Int (Array Int Int))) (|v_old(#memory_int)_BEFORE_CALL_163| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_163| (Array Int (Array Int Int)))) (or (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_163| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_163| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_163| 1) 1) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_503| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_503|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_503| 18446744073709551616)))) (exists ((|v_#length_23| (Array Int Int))) (and (= (select |v_#length_23| 2) 37) (= 40 (select |v_#length_23| 4)) (= |#length| (store |v_#length_23| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_191| 16)) (= (select |v_#length_23| 3) 12) (= (select |v_#length_23| 1) 2))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_163| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_163| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_163| 4) 32) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_191|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_163| 4) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_163| 1) 0) 48) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_163| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_163| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_163| 4) 24)) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_39 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_39 Int) (|v_aws_is_mem_zeroed_#t~mem42_336| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_39 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_39 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_336| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_39 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_39 18446744073709551616)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_39 18446744073709551616) 9223372036854775807) (= |v_aws_is_mem_zeroed_#t~mem42_336| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_39) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_39 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_39 18446744073709551616))))) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_39) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_39 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_39 18446744073709551616) (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_336|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_39 18446744073709551616)))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_39))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_191| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_248) (exists ((|v_#valid_33| (Array Int Int))) (and (= (store |v_#valid_33| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_191| 1) |#valid|) (= (select |v_#valid_33| 2) 1) (= (select |v_#valid_33| 4) 1) (= (select |v_#valid_33| 0) 0) (= (select |v_#valid_33| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_191|) 0) (= (select |v_#valid_33| 1) 1) (= (select |v_#valid_33| 3) 1))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_163| 4) 32) 0)) (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_163| 4) 16) |#funAddr~s_can_fail_realloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_163| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_int)_BEFORE_CALL_163| 1) 1) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_503| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_503|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_503| 18446744073709551616)))) (exists ((|v_#length_23| (Array Int Int))) (and (= (select |v_#length_23| 2) 37) (= 40 (select |v_#length_23| 4)) (= |#length| (store |v_#length_23| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_191| 16)) (= (select |v_#length_23| 3) 12) (= (select |v_#length_23| 1) 2))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_163| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_163| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_163| 4) 32) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_191|) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_163| 4) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_163| 1) 0) 48) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_163| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_163| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_163| 4) 24)) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_40 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_40 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_40 Int) (|v_aws_is_mem_zeroed_#t~mem42_336| Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_40 Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_336| 256) 0)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_40) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_40 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_40) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_40 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_40 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_336|)) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_40 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_40) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_40 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_40 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_336|))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_40 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_40 18446744073709551616)))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_191| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_248) (exists ((|v_#valid_33| (Array Int Int))) (and (= (store |v_#valid_33| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_191| 1) |#valid|) (= (select |v_#valid_33| 2) 1) (= (select |v_#valid_33| 4) 1) (= (select |v_#valid_33| 0) 0) (= (select |v_#valid_33| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_191|) 0) (= (select |v_#valid_33| 1) 1) (= (select |v_#valid_33| 3) 1))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_163| 4) 32) 0)))) (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:14:58,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:14:58,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:14:58,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 36, 33] total 83 [2024-11-09 01:14:58,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990207566] [2024-11-09 01:14:58,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:14:58,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-09 01:14:58,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:58,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-09 01:14:58,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=9027, Unknown=1, NotChecked=0, Total=9702 [2024-11-09 01:14:58,201 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 83 states, 79 states have (on average 1.7341772151898733) internal successors, (137), 80 states have internal predecessors, (137), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:15:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:07,642 INFO L93 Difference]: Finished difference Result 201 states and 224 transitions. [2024-11-09 01:15:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 01:15:07,643 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 79 states have (on average 1.7341772151898733) internal successors, (137), 80 states have internal predecessors, (137), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 65 [2024-11-09 01:15:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:07,645 INFO L225 Difference]: With dead ends: 201 [2024-11-09 01:15:07,645 INFO L226 Difference]: Without dead ends: 136 [2024-11-09 01:15:07,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3946 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=771, Invalid=10358, Unknown=1, NotChecked=0, Total=11130 [2024-11-09 01:15:07,647 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 50 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 3482 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 3518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:07,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1565 Invalid, 3518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3482 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2024-11-09 01:15:07,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-09 01:15:07,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 91. [2024-11-09 01:15:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 76 states have internal predecessors, (83), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 01:15:07,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2024-11-09 01:15:07,714 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 65 [2024-11-09 01:15:07,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:07,715 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2024-11-09 01:15:07,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 79 states have (on average 1.7341772151898733) internal successors, (137), 80 states have internal predecessors, (137), 6 states have call successors, (11), 5 states have call predecessors, (11), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-09 01:15:07,715 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2024-11-09 01:15:07,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-09 01:15:07,716 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:07,716 INFO L215 NwaCegarLoop]: trace histogram [16, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:15:07,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 01:15:07,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:07,918 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:07,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:07,918 INFO L85 PathProgramCache]: Analyzing trace with hash -623712085, now seen corresponding path program 13 times [2024-11-09 01:15:07,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:07,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958380544] [2024-11-09 01:15:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:07,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 7 proven. 294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:13,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:13,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958380544] [2024-11-09 01:15:13,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958380544] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:13,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741468924] [2024-11-09 01:15:13,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 01:15:13,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:13,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:13,587 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:13,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 01:15:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:14,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-09 01:15:14,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:14,715 INFO L378 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 11 treesize of output 7 [2024-11-09 01:15:14,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 01:15:14,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:14,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2024-11-09 01:15:14,980 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:14,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-09 01:15:15,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:15,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-09 01:15:15,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:15,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-09 01:15:15,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:15,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-09 01:15:15,544 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:15,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-09 01:15:15,735 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:15,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-09 01:15:15,941 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:15,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-09 01:15:16,235 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:16,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-09 01:15:16,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:16,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-11-09 01:15:16,938 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:16,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2024-11-09 01:15:17,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:17,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 129 treesize of output 164 [2024-11-09 01:15:17,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:17,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 176 [2024-11-09 01:15:17,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:15:17,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 147 treesize of output 188 [2024-11-09 01:15:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:15:27,677 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:15:58,074 WARN L286 SmtUtils]: Spent 26.10s on a formula simplification. DAG size of input: 192 DAG size of output: 188 (called from [L 276] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-11-09 01:16:43,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 74 [2024-11-09 01:16:43,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 104 [2024-11-09 01:16:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 282 refuted. 19 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:16:43,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741468924] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:16:43,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318871012] [2024-11-09 01:16:43,728 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:16:43,729 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:16:43,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:16:43,729 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:16:43,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:16:43,767 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:16:44,900 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:16:45,158 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:16:45,171 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:16:45,439 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:16:45,642 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:16:56,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11314#(and (exists ((|v_old(#memory_$Pointer$.base)_BEFORE_CALL_173| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_201| Int) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_264 Int) (|v_old(#memory_int)_BEFORE_CALL_173| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_173| (Array Int (Array Int Int)))) (or (and (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_173| 1) 0)) (exists ((|v_#length_24| (Array Int Int))) (and (= 12 (select |v_#length_24| 3)) (= (select |v_#length_24| 2) 37) (= 40 (select |v_#length_24| 4)) (= |#length| (store |v_#length_24| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_201| 16)) (= (select |v_#length_24| 1) 2))) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_173| 4) 16)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_173| 4) 16)) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_173| 4) 24)) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_173| 4) 0)) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_565| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_565| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_565|))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_173| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_41 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_41 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_41 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_41 Int) (|v_aws_is_mem_zeroed_#t~mem42_370| Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_41) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_41 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_41 18446744073709551616)) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_41 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_41) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_41 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_41 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_370|)) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_41 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_41) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_41 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_41 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_370|))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_370| 256) 0)))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_173| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_173| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_201| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_264) (= (select (select |v_old(#memory_int)_BEFORE_CALL_173| 1) 1) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_173| 4) 24)) (exists ((|v_#valid_34| (Array Int Int))) (and (= (select |v_#valid_34| 3) 1) (= (select |v_#valid_34| 2) 1) (= (store |v_#valid_34| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_201| 1) |#valid|) (= (select |v_#valid_34| 4) 1) (= (select |v_#valid_34| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_201|) 0) (= (select |v_#valid_34| 1) 1) (= (select |v_#valid_34| 0) 0))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_173| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_173| 4) 32) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_201|)) (and (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_173| 1) 0)) (exists ((|v_#length_24| (Array Int Int))) (and (= 12 (select |v_#length_24| 3)) (= (select |v_#length_24| 2) 37) (= 40 (select |v_#length_24| 4)) (= |#length| (store |v_#length_24| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_201| 16)) (= (select |v_#length_24| 1) 2))) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_173| 4) 16)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_173| 4) 16)) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_173| 4) 24)) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_173| 4) 0)) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_565| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_565| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_565|))) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_42 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_42 Int) (|v_aws_is_mem_zeroed_#t~mem42_370| Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_42 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_42 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_42) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_42 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_42 18446744073709551616)) (or (and (= |v_aws_is_mem_zeroed_#t~mem42_370| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_42) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_42 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_42 18446744073709551616)))) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_42 18446744073709551616))) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_42) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_42 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_42 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_370|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_42 18446744073709551616) 9223372036854775807))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_370| 256) 0)))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_173| 4) 0) |#funAddr~s_can_fail_malloc_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_173| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_173| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_201| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_264) (= (select (select |v_old(#memory_int)_BEFORE_CALL_173| 1) 1) 0) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_173| 4) 24)) (exists ((|v_#valid_34| (Array Int Int))) (and (= (select |v_#valid_34| 3) 1) (= (select |v_#valid_34| 2) 1) (= (store |v_#valid_34| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_201| 1) |#valid|) (= (select |v_#valid_34| 4) 1) (= (select |v_#valid_34| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_201|) 0) (= (select |v_#valid_34| 1) 1) (= (select |v_#valid_34| 0) 0))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_173| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_173| 4) 32) 0) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_201|)))) (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:16:56,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:16:56,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:16:56,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 39, 36] total 107 [2024-11-09 01:16:56,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44649271] [2024-11-09 01:16:56,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:16:56,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2024-11-09 01:16:56,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:16:56,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2024-11-09 01:16:56,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=14272, Unknown=20, NotChecked=0, Total=15006 [2024-11-09 01:16:56,686 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 107 states, 100 states have (on average 1.77) internal successors, (177), 103 states have internal predecessors, (177), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-09 01:17:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:17:16,992 INFO L93 Difference]: Finished difference Result 297 states and 335 transitions. [2024-11-09 01:17:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-09 01:17:16,993 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 100 states have (on average 1.77) internal successors, (177), 103 states have internal predecessors, (177), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 69 [2024-11-09 01:17:16,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:17:16,995 INFO L225 Difference]: With dead ends: 297 [2024-11-09 01:17:16,995 INFO L226 Difference]: Without dead ends: 264 [2024-11-09 01:17:16,998 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6016 ImplicationChecksByTransitivity, 76.8s TimeCoverageRelationStatistics Valid=1031, Invalid=24389, Unknown=20, NotChecked=0, Total=25440 [2024-11-09 01:17:16,999 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 145 mSDsluCounter, 2262 mSDsCounter, 0 mSdLazyCounter, 5364 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 5483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 5364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:17:16,999 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 2299 Invalid, 5483 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [119 Valid, 5364 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2024-11-09 01:17:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-11-09 01:17:17,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 94. [2024-11-09 01:17:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 79 states have internal predecessors, (82), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 01:17:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2024-11-09 01:17:17,081 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 69 [2024-11-09 01:17:17,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:17:17,082 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2024-11-09 01:17:17,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 100 states have (on average 1.77) internal successors, (177), 103 states have internal predecessors, (177), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-09 01:17:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2024-11-09 01:17:17,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-09 01:17:17,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:17:17,083 INFO L215 NwaCegarLoop]: trace histogram [16, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:17:17,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 01:17:17,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:17,284 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:17:17,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:17:17,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1535036019, now seen corresponding path program 14 times [2024-11-09 01:17:17,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:17:17,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972772434] [2024-11-09 01:17:17,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:17:17,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:17:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:17:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 4 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:17:22,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:17:22,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972772434] [2024-11-09 01:17:22,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972772434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:22,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500626674] [2024-11-09 01:17:22,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:17:22,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:17:22,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:17:22,571 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:17:22,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 01:17:28,873 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 01:17:28,874 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:17:28,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-09 01:17:28,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:17:29,141 INFO L378 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 11 treesize of output 7 [2024-11-09 01:17:29,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-09 01:17:29,313 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:29,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 30 treesize of output 32 [2024-11-09 01:17:29,419 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:29,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-09 01:17:29,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:29,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-09 01:17:29,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:29,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-09 01:17:29,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:29,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2024-11-09 01:17:29,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:29,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 92 [2024-11-09 01:17:30,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:30,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 104 [2024-11-09 01:17:30,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:30,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2024-11-09 01:17:30,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:30,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 102 treesize of output 128 [2024-11-09 01:17:30,792 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:30,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 111 treesize of output 140 [2024-11-09 01:17:31,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:31,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 120 treesize of output 152 [2024-11-09 01:17:31,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:31,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 129 treesize of output 164 [2024-11-09 01:17:31,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:31,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 138 treesize of output 176 [2024-11-09 01:17:32,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:17:32,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 147 treesize of output 188 [2024-11-09 01:17:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-09 01:17:39,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:17:40,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500626674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:17:40,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2139001290] [2024-11-09 01:17:40,750 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 01:17:40,750 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:17:40,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:17:40,751 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:17:40,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:17:40,790 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:17:41,877 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 168 for LOIs [2024-11-09 01:17:42,285 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:17:42,310 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 113 for LOIs [2024-11-09 01:17:42,695 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:17:42,935 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:17:52,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12283#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_old(#memory_$Pointer$.base)_BEFORE_CALL_183| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_277 Int) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_211| Int) (|v_old(#memory_int)_BEFORE_CALL_183| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_183| (Array Int (Array Int Int)))) (or (and (exists ((|v_aws_is_mem_zeroed_#t~mem42_394| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_43 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_43 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_43 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_43 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_43) (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_43) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_43 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_43 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_394|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_43 18446744073709551616))) (and (= |v_aws_is_mem_zeroed_#t~mem42_394| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_43) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_43 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_43 18446744073709551616)))) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_43 18446744073709551616) 9223372036854775807))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_43 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_43 18446744073709551616)) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_394| 256) 0)))) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_183| 4) 0)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_183| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_183| 4) 32) 0) (exists ((|v_#valid_35| (Array Int Int))) (and (= (select |v_#valid_35| 1) 1) (= (store |v_#valid_35| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_211| 1) |#valid|) (= (select |v_#valid_35| 0) 0) (= (select |v_#valid_35| 4) 1) (= (select |v_#valid_35| 2) 1) (= (select |v_#valid_35| 3) 1) (= (select |v_#valid_35| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_211|) 0))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_183| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_183| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_183| 4) 24)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_183| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_183| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#length_25| (Array Int Int))) (and (= (select |v_#length_25| 2) 37) (= (select |v_#length_25| 1) 2) (= (select |v_#length_25| 3) 12) (= |#length| (store |v_#length_25| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_211| 16)) (= 40 (select |v_#length_25| 4)))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_211| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_277) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_183| 4) 32) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_183| 1) 0) 48) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_183| 4) 24)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_211|) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_589| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_589|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_589| 18446744073709551616)))) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_183| 4) 16))) (and (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_183| 4) 0)) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_183| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_183| 4) 32) 0) (exists ((|v_aws_is_mem_zeroed_#t~mem42_394| Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_44 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_44 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_44 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_44 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_44) (or (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_44 18446744073709551616)) (= |v_aws_is_mem_zeroed_#t~mem42_394| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_44) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_44 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_44 18446744073709551616))))) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_44 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_44) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_44 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_44 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_394|))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_394| 256) 0)) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_44 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_44 18446744073709551616)))) (exists ((|v_#valid_35| (Array Int Int))) (and (= (select |v_#valid_35| 1) 1) (= (store |v_#valid_35| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_211| 1) |#valid|) (= (select |v_#valid_35| 0) 0) (= (select |v_#valid_35| 4) 1) (= (select |v_#valid_35| 2) 1) (= (select |v_#valid_35| 3) 1) (= (select |v_#valid_35| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_211|) 0))) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_183| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_183| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_183| 4) 24)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_183| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_183| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#length_25| (Array Int Int))) (and (= (select |v_#length_25| 2) 37) (= (select |v_#length_25| 1) 2) (= (select |v_#length_25| 3) 12) (= |#length| (store |v_#length_25| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_211| 16)) (= 40 (select |v_#length_25| 4)))) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_211| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_277) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_183| 4) 32) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_183| 1) 0) 48) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_183| 4) 24)) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_211|) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_589| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_589|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_589| 18446744073709551616)))) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_183| 4) 16))))) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:17:52,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:17:52,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 01:17:52,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 28] total 63 [2024-11-09 01:17:52,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891222406] [2024-11-09 01:17:52,204 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 01:17:52,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-09 01:17:52,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:17:52,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-09 01:17:52,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=6567, Unknown=1, NotChecked=0, Total=6806 [2024-11-09 01:17:52,207 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 63 states, 58 states have (on average 1.603448275862069) internal successors, (93), 60 states have internal predecessors, (93), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-09 01:18:12,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:18:12,437 INFO L93 Difference]: Finished difference Result 179 states and 195 transitions. [2024-11-09 01:18:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-11-09 01:18:12,438 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 58 states have (on average 1.603448275862069) internal successors, (93), 60 states have internal predecessors, (93), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 72 [2024-11-09 01:18:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:18:12,440 INFO L225 Difference]: With dead ends: 179 [2024-11-09 01:18:12,440 INFO L226 Difference]: Without dead ends: 149 [2024-11-09 01:18:12,442 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=559, Invalid=15696, Unknown=1, NotChecked=0, Total=16256 [2024-11-09 01:18:12,443 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 58 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 3667 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 3727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 3667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:18:12,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1083 Invalid, 3727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 3667 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2024-11-09 01:18:12,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-11-09 01:18:12,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 92. [2024-11-09 01:18:12,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 01:18:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2024-11-09 01:18:12,551 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 72 [2024-11-09 01:18:12,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:18:12,552 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2024-11-09 01:18:12,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 58 states have (on average 1.603448275862069) internal successors, (93), 60 states have internal predecessors, (93), 7 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-09 01:18:12,553 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2024-11-09 01:18:12,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-09 01:18:12,554 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:18:12,554 INFO L215 NwaCegarLoop]: trace histogram [16, 14, 14, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:18:12,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 01:18:12,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 01:18:12,755 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:18:12,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:18:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash -626267068, now seen corresponding path program 2 times [2024-11-09 01:18:12,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:18:12,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938583059] [2024-11-09 01:18:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:18:12,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:18:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:18:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-11-09 01:18:14,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:18:14,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938583059] [2024-11-09 01:18:14,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938583059] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:18:14,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481433792] [2024-11-09 01:18:14,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:18:14,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:18:14,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:18:14,311 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:18:14,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 01:18:17,495 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-09 01:18:17,495 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:18:17,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-09 01:18:17,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:18:17,618 INFO L378 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 [2024-11-09 01:18:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 24 proven. 154 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2024-11-09 01:18:40,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:18:41,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-09 01:18:41,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2024-11-09 01:18:43,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:18:43,318 INFO L378 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 53 treesize of output 57 [2024-11-09 01:18:43,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2024-11-09 01:18:43,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 01:18:43,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 32 treesize of output 32 [2024-11-09 01:18:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 64 proven. 82 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2024-11-09 01:18:43,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481433792] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:18:43,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117376620] [2024-11-09 01:18:43,417 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-09 01:18:43,417 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:18:43,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:18:43,418 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:18:43,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:18:43,930 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:18:45,755 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:18:45,768 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 271 for LOIs [2024-11-09 01:18:46,859 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 20 for LOIs [2024-11-09 01:18:46,952 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:18:47,164 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:19:09,895 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13389#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (or (exists ((|v_ULTIMATE.start_aws_linked_list_node_reset_harness_#t~ret681#1_BEFORE_CALL_2| Int)) (and (or (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_47 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_47 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_47 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_47 Int)) (and (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_47 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_47 18446744073709551616)) (= |v_ULTIMATE.start_aws_linked_list_node_reset_harness_#t~ret681#1_BEFORE_CALL_2| 0) (exists ((|v_aws_is_mem_zeroed_#t~mem42_451| Int)) (and (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_47) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_47 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_47 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_451|) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_47 18446744073709551616) 9223372036854775807)) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_47 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_47) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_47 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_47 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_451|))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_451| 256) 0)))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_47))) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_48 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_48 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_48 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_48 Int)) (and (<= (+ 1 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_48 18446744073709551616)) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_48 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_48) (= |v_ULTIMATE.start_aws_linked_list_node_reset_harness_#t~ret681#1_BEFORE_CALL_2| 0) (exists ((|v_aws_is_mem_zeroed_#t~mem42_451| Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_451| 256) 0)) (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_48) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_48 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_48 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_451|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_48 18446744073709551616))) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_48 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_48) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_48 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_48 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_451|)))))))) (= |__VERIFIER_assert_#in~cond| 0))) (exists ((|v_aws_linked_list_node_reset_#t~ret298_BEFORE_CALL_48| Int) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_195| (Array Int (Array Int Int))) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_301 Int) (|v_old(#memory_int)_BEFORE_CALL_195| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_195| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_237| Int)) (and (= |__VERIFIER_assert_#in~cond| 0) (or (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_195| 4) 32) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_646| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_646| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_646|))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_195| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_195| 1) 1) 0) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_195| 4) 16)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_237| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_301) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_237|) (exists ((|v_#valid_36| (Array Int Int))) (and (= (select |v_#valid_36| 1) 1) (= (select |v_#valid_36| 2) 1) (= (select |v_#valid_36| 0) 0) (= (select |v_#valid_36| 3) 1) (= (store |v_#valid_36| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_237| 1) |#valid|) (= (select |v_#valid_36| 4) 1) (= (select |v_#valid_36| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_237|) 0))) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_195| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_195| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (exists ((|v_#length_26| (Array Int Int))) (and (= 12 (select |v_#length_26| 3)) (= |#length| (store |v_#length_26| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_237| 16)) (= (select |v_#length_26| 2) 37) (= 40 (select |v_#length_26| 4)) (= 2 (select |v_#length_26| 1)))) (exists ((v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_49 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_49 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_49 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_49 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_49) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_49 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_49 18446744073709551616)) (exists ((|v_aws_is_mem_zeroed_#t~mem42_451| Int)) (and (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_49) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_49 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_49 (- 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_451|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_49 18446744073709551616))) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_49 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_49) (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_49 18446744073709551616) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_49)) |v_aws_is_mem_zeroed_#t~mem42_451|))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_451| 256) 0)))) (= |v_aws_linked_list_node_reset_#t~ret298_BEFORE_CALL_48| 0))) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_195| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_195| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_195| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_195| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_195| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_195| 4) 32) 0)) (and (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_195| 4) 32) 0) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_646| Int)) (and (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_646| 18446744073709551616)) (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_646|))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_195| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_195| 1) 1) 0) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_195| 4) 16)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_237| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_301) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_237|) (exists ((|v_#valid_36| (Array Int Int))) (and (= (select |v_#valid_36| 1) 1) (= (select |v_#valid_36| 2) 1) (= (select |v_#valid_36| 0) 0) (= (select |v_#valid_36| 3) 1) (= (store |v_#valid_36| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_237| 1) |#valid|) (= (select |v_#valid_36| 4) 1) (= (select |v_#valid_36| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_237|) 0))) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_195| 4) 16)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_195| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (exists ((|v_#length_26| (Array Int Int))) (and (= 12 (select |v_#length_26| 3)) (= |#length| (store |v_#length_26| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_237| 16)) (= (select |v_#length_26| 2) 37) (= 40 (select |v_#length_26| 4)) (= 2 (select |v_#length_26| 1)))) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_195| 4) 0)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_195| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_195| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_195| 4) 24)) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_50 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_50 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_50 Int) (v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_50 Int)) (and (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_50) (exists ((|v_aws_is_mem_zeroed_#t~mem42_451| Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_451| 256) 0)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_50 18446744073709551616) 9223372036854775807) (= |v_aws_is_mem_zeroed_#t~mem42_451| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_50) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_50 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_50 18446744073709551616))))) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_50) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_50 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_50 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_451|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_50 18446744073709551616)))))) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_50 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_50 18446744073709551616)) (= |v_aws_linked_list_node_reset_#t~ret298_BEFORE_CALL_48| 0))) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_195| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_195| 4) 32) 0)))))) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:19:09,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:19:09,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:19:09,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 15] total 48 [2024-11-09 01:19:09,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508743595] [2024-11-09 01:19:09,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:19:09,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 01:19:09,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:19:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 01:19:09,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=4548, Unknown=13, NotChecked=0, Total=4830 [2024-11-09 01:19:09,898 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 48 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 10 states have call successors, (16), 5 states have call predecessors, (16), 11 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2024-11-09 01:19:19,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:19:22,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:19:24,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:19:26,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:19:28,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:19:32,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:19:36,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:19:38,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:19:42,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:19:44,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:19:48,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:19:53,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:19:55,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:19:57,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:01,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:03,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:05,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:09,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:11,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:13,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:17,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:19,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:21,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:26,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:28,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:30,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:34,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:36,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:38,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:42,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:44,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:46,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:50,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:52,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:55,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:20:59,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:21:01,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:21:03,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:21:07,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:21:09,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:21:11,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:21:15,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:21:18,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:21:43,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:21:45,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:22:18,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:22:18,424 INFO L93 Difference]: Finished difference Result 180 states and 196 transitions. [2024-11-09 01:22:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-09 01:22:18,425 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 10 states have call successors, (16), 5 states have call predecessors, (16), 11 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) Word has length 91 [2024-11-09 01:22:18,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:22:18,426 INFO L225 Difference]: With dead ends: 180 [2024-11-09 01:22:18,426 INFO L226 Difference]: Without dead ends: 155 [2024-11-09 01:22:18,428 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 221 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2662 ImplicationChecksByTransitivity, 141.8s TimeCoverageRelationStatistics Valid=860, Invalid=11294, Unknown=56, NotChecked=0, Total=12210 [2024-11-09 01:22:18,428 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 140 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 2557 mSolverCounterSat, 66 mSolverCounterUnsat, 44 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 2667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2557 IncrementalHoareTripleChecker+Invalid, 44 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:22:18,429 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 927 Invalid, 2667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2557 Invalid, 44 Unknown, 0 Unchecked, 93.5s Time] [2024-11-09 01:22:18,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-09 01:22:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2024-11-09 01:22:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 01:22:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2024-11-09 01:22:18,536 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 91 [2024-11-09 01:22:18,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:22:18,537 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2024-11-09 01:22:18,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 10 states have call successors, (16), 5 states have call predecessors, (16), 11 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2024-11-09 01:22:18,537 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2024-11-09 01:22:18,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-09 01:22:18,538 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:22:18,538 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:22:18,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-09 01:22:18,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 01:22:18,739 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:22:18,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:22:18,740 INFO L85 PathProgramCache]: Analyzing trace with hash -838052174, now seen corresponding path program 3 times [2024-11-09 01:22:18,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:22:18,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992155661] [2024-11-09 01:22:18,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:22:18,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:22:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:22:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 2 proven. 369 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2024-11-09 01:22:20,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:22:20,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992155661] [2024-11-09 01:22:20,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992155661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:22:20,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143913267] [2024-11-09 01:22:20,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 01:22:20,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:22:20,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:22:20,197 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:22:20,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 01:22:20,677 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 01:22:20,677 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:22:20,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-09 01:22:20,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:22:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 123 proven. 380 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 01:22:22,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:22:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 2 proven. 369 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2024-11-09 01:22:23,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143913267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:22:23,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [4249767] [2024-11-09 01:22:23,962 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-09 01:22:23,962 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:22:23,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:22:23,963 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:22:23,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:22:24,553 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 108 for LOIs [2024-11-09 01:22:26,213 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2024-11-09 01:22:26,226 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 271 for LOIs [2024-11-09 01:22:27,246 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 20 for LOIs [2024-11-09 01:22:27,329 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 124 for LOIs [2024-11-09 01:22:27,543 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 01:22:52,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14553#(and (<= 1 |#StackHeapBarrier|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (or (exists ((|v_old(#memory_$Pointer$.offset)_BEFORE_CALL_207| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_BEFORE_CALL_207| (Array Int (Array Int Int))) (|v_aws_linked_list_node_reset_#t~ret298_BEFORE_CALL_53| Int) (|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_255| Int) (v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_319 Int) (|v_old(#memory_int)_BEFORE_CALL_207| (Array Int (Array Int Int)))) (and (or (and (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_207| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_207| 4) 32) 0) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_207| 4) 16)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_207| 4) 0)) (exists ((|v_#valid_37| (Array Int Int))) (and (= |#valid| (store |v_#valid_37| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_255| 1)) (= (select |v_#valid_37| 2) 1) (= (select |v_#valid_37| 3) 1) (= (select |v_#valid_37| 4) 1) (= (select |v_#valid_37| 1) 1) (= (select |v_#valid_37| 0) 0) (= (select |v_#valid_37| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_255|) 0))) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_55 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_55 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_55 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_55 Int)) (and (exists ((|v_aws_is_mem_zeroed_#t~mem42_507| Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_507| 256) 0)) (or (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_55 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_55) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_55 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_55 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_507|)) (and (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_55 18446744073709551616)) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_55) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_55 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_55 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_507|))))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_55) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_55 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_55 18446744073709551616)) (= |v_aws_linked_list_node_reset_#t~ret298_BEFORE_CALL_53| 0))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_255|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_207| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_207| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_704| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_704|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_704| 18446744073709551616)))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_207| 1) 0) 48) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_207| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (exists ((|v_#length_27| (Array Int Int))) (and (= 12 (select |v_#length_27| 3)) (= |#length| (store |v_#length_27| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_255| 16)) (= (select |v_#length_27| 1) 2) (= (select |v_#length_27| 2) 37) (= 40 (select |v_#length_27| 4)))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_207| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_207| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_207| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_207| 4) 16)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_255| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_319)) (and (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_207| 4) 24)) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_207| 4) 32) 0) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_207| 4) 16)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_207| 4) 0)) (exists ((|v_#valid_37| (Array Int Int))) (and (= |#valid| (store |v_#valid_37| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_255| 1)) (= (select |v_#valid_37| 2) 1) (= (select |v_#valid_37| 3) 1) (= (select |v_#valid_37| 4) 1) (= (select |v_#valid_37| 1) 1) (= (select |v_#valid_37| 0) 0) (= (select |v_#valid_37| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_255|) 0))) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_56 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_56 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_56 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_56 Int)) (and (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_56 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_56 18446744073709551616)) (exists ((|v_aws_is_mem_zeroed_#t~mem42_507| Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_507| 256) 0)) (or (and (= |v_aws_is_mem_zeroed_#t~mem42_507| (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_56) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_56 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_56 18446744073709551616)))) (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_56 18446744073709551616) 9223372036854775807)) (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_56) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_56 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_56 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_507|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_56 18446744073709551616)))))) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_56) (= |v_aws_linked_list_node_reset_#t~ret298_BEFORE_CALL_53| 0))) (<= (+ |#StackHeapBarrier| 1) |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_255|) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_207| 4) 8) |#funAddr~s_can_fail_free_allocator.base|) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_207| 4) 8) |#funAddr~s_can_fail_free_allocator.offset|) (exists ((|v_#Ultimate.C_memset_#t~loopctr684_704| Int)) (and (<= 0 |v_#Ultimate.C_memset_#t~loopctr684_704|) (<= 16 (mod |v_#Ultimate.C_memset_#t~loopctr684_704| 18446744073709551616)))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_207| 1) 0) 48) (= (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_207| 4) 0) |#funAddr~s_can_fail_malloc_allocator.offset|) (exists ((|v_#length_27| (Array Int Int))) (and (= 12 (select |v_#length_27| 3)) (= |#length| (store |v_#length_27| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_255| 16)) (= (select |v_#length_27| 1) 2) (= (select |v_#length_27| 2) 37) (= 40 (select |v_#length_27| 4)))) (= (select (select |v_old(#memory_int)_BEFORE_CALL_207| 1) 1) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_207| 4) 32) 0) (= (select (select |v_old(#memory_$Pointer$.base)_BEFORE_CALL_207| 4) 24) |#funAddr~s_can_fail_calloc_allocator.base|) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |v_old(#memory_$Pointer$.offset)_BEFORE_CALL_207| 4) 16)) (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_255| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_319))) (= |__VERIFIER_assert_#in~cond| 0))) (exists ((|v_ULTIMATE.start_aws_linked_list_node_reset_harness_#t~ret681#1_BEFORE_CALL_3| Int)) (and (= |__VERIFIER_assert_#in~cond| 0) (or (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_53 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_53 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_53 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_53 Int)) (and (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_53 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_53 18446744073709551616)) (exists ((|v_aws_is_mem_zeroed_#t~mem42_507| Int)) (and (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_53) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_53 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_53 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_507|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_53 18446744073709551616))) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_53 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_53) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_53 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_53 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_507|))) (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_507| 256) 0)))) (= |v_ULTIMATE.start_aws_linked_list_node_reset_harness_#t~ret681#1_BEFORE_CALL_3| 0) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_53))) (exists ((v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_54 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_54 Int) (v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_54 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_54 Int)) (and (= |v_ULTIMATE.start_aws_linked_list_node_reset_harness_#t~ret681#1_BEFORE_CALL_3| 0) (<= (+ (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_54 18446744073709551616) 1) (mod v_aws_is_mem_zeroed_~bufsize_BEFORE_RETURN_54 18446744073709551616)) (<= 0 v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_54) (exists ((|v_aws_is_mem_zeroed_#t~mem42_507| Int)) (and (not (= (mod |v_aws_is_mem_zeroed_#t~mem42_507| 256) 0)) (or (and (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_54) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_54 (- 18446744073709551616) (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_54 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_507|) (<= 9223372036854775808 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_54 18446744073709551616))) (and (<= (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_54 18446744073709551616) 9223372036854775807) (= (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_54) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_54 (mod v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_54 18446744073709551616))) |v_aws_is_mem_zeroed_#t~mem42_507|))))))))))) (= ~tl_last_error~0 0))' at error location [2024-11-09 01:22:52,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 01:22:52,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 01:22:52,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 32, 17] total 61 [2024-11-09 01:22:52,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577974513] [2024-11-09 01:22:52,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 01:22:52,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-09 01:22:52,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:22:52,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-09 01:22:52,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=6248, Unknown=5, NotChecked=0, Total=6806 [2024-11-09 01:22:52,868 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 61 states, 61 states have (on average 2.8360655737704916) internal successors, (173), 61 states have internal predecessors, (173), 2 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 01:22:57,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:22:57,079 INFO L93 Difference]: Finished difference Result 204 states and 222 transitions. [2024-11-09 01:22:57,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 01:22:57,080 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.8360655737704916) internal successors, (173), 61 states have internal predecessors, (173), 2 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 97 [2024-11-09 01:22:57,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:22:57,082 INFO L225 Difference]: With dead ends: 204 [2024-11-09 01:22:57,083 INFO L226 Difference]: Without dead ends: 173 [2024-11-09 01:22:57,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2082 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=643, Invalid=8858, Unknown=5, NotChecked=0, Total=9506 [2024-11-09 01:22:57,085 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 173 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 2322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:22:57,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 1406 Invalid, 2322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2320 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 01:22:57,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-09 01:22:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 107. [2024-11-09 01:22:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 states have internal predecessors, (96), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-09 01:22:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2024-11-09 01:22:57,237 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 97 [2024-11-09 01:22:57,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:22:57,238 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2024-11-09 01:22:57,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.8360655737704916) internal successors, (173), 61 states have internal predecessors, (173), 2 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 01:22:57,238 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2024-11-09 01:22:57,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-09 01:22:57,239 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:22:57,239 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:22:57,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 01:22:57,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73299831-475d-4443-80d3-b4a70ff0d60a/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:22:57,440 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:22:57,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:22:57,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1481799724, now seen corresponding path program 4 times [2024-11-09 01:22:57,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:22:57,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849451895] [2024-11-09 01:22:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:22:57,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:22:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat