./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/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_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/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 32bit --witnessprinter.graph.data.programhash cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:29:28,338 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:29:28,434 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 04:29:28,445 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:29:28,445 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:29:28,486 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:29:28,487 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:29:28,488 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:29:28,489 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:29:28,491 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:29:28,491 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:29:28,492 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:29:28,492 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:29:28,492 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:29:28,493 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:29:28,494 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:29:28,495 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:29:28,495 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:29:28,496 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:29:28,496 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:29:28,497 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:29:28,499 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:29:28,500 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:29:28,501 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 04:29:28,501 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:29:28,501 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:29:28,502 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:29:28,502 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:29:28,502 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 04:29:28,503 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:29:28,503 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 04:29:28,503 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:29:28,504 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:29:28,504 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 04:29:28,505 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:29:28,505 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:29:28,505 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:29:28,506 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:29:28,506 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:28,506 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:29:28,507 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:29:28,510 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 04:29:28,510 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:29:28,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:29:28,511 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:29:28,511 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:29:28,512 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:29:28,512 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_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2024-11-09 04:29:28,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:29:28,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:29:28,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:29:28,936 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:29:28,936 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:29:28,938 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i Unable to find full path for "g++" [2024-11-09 04:29:30,997 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:29:31,174 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:29:31,175 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2024-11-09 04:29:31,183 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/data/5f25665d1/678df230bf284ccc83ef0808f37a0cf4/FLAGc3e202994 [2024-11-09 04:29:31,558 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/data/5f25665d1/678df230bf284ccc83ef0808f37a0cf4 [2024-11-09 04:29:31,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:29:31,562 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:29:31,564 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:31,565 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:29:31,575 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:29:31,576 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,579 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dbb92a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31, skipping insertion in model container [2024-11-09 04:29:31,580 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:31,603 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:29:31,879 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_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2024-11-09 04:29:31,923 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:29:31,933 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:29:31,950 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_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2024-11-09 04:29:31,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:29:31,991 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:29:31,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31 WrapperNode [2024-11-09 04:29:31,992 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:31,993 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:29:31,994 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:29:31,994 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:29:32,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:32,014 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:32,046 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 108 [2024-11-09 04:29:32,050 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:29:32,051 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:29:32,051 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:29:32,051 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:29:32,063 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:32,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:32,066 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:32,067 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:32,078 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:32,087 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:32,088 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:32,090 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:32,092 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:29:32,097 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:29:32,097 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:29:32,101 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:29:32,102 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (1/1) ... [2024-11-09 04:29:32,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:32,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:32,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:29:32,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:29:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:29:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:29:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 04:29:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 04:29:32,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:29:32,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:29:32,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 04:29:32,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 04:29:32,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 04:29:32,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 04:29:32,265 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:29:32,267 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:29:32,574 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-11-09 04:29:32,574 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:29:32,617 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:29:32,617 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 04:29:32,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:32 BoogieIcfgContainer [2024-11-09 04:29:32,618 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:29:32,620 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:29:32,621 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:29:32,624 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:29:32,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:29:31" (1/3) ... [2024-11-09 04:29:32,625 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632da3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:29:32, skipping insertion in model container [2024-11-09 04:29:32,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:31" (2/3) ... [2024-11-09 04:29:32,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@632da3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:29:32, skipping insertion in model container [2024-11-09 04:29:32,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:29:32" (3/3) ... [2024-11-09 04:29:32,627 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2024-11-09 04:29:32,646 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:29:32,646 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 04:29:32,722 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:29:32,728 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;@606a3711, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:29:32,728 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 04:29:32,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 32 states have (on average 1.5625) internal successors, (50), 33 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:29:32,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:29:32,739 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:32,740 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:32,740 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:32,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:32,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1571864468, now seen corresponding path program 1 times [2024-11-09 04:29:32,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:32,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35790197] [2024-11-09 04:29:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:32,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:33,054 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 04:29:33,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:33,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35790197] [2024-11-09 04:29:33,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35790197] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:33,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:29:33,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:29:33,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416958734] [2024-11-09 04:29:33,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:33,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:29:33,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:33,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:29:33,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:29:33,102 INFO L87 Difference]: Start difference. First operand has 38 states, 32 states have (on average 1.5625) internal successors, (50), 33 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:33,264 INFO L93 Difference]: Finished difference Result 93 states and 146 transitions. [2024-11-09 04:29:33,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:29:33,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 04:29:33,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:33,277 INFO L225 Difference]: With dead ends: 93 [2024-11-09 04:29:33,278 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 04:29:33,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:29:33,285 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:33,287 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 67 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 04:29:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2024-11-09 04:29:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:29:33,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 56 transitions. [2024-11-09 04:29:33,342 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 56 transitions. Word has length 13 [2024-11-09 04:29:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:33,344 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 56 transitions. [2024-11-09 04:29:33,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:33,345 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 56 transitions. [2024-11-09 04:29:33,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 04:29:33,346 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:33,346 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 04:29:33,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:29:33,347 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:33,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:33,348 INFO L85 PathProgramCache]: Analyzing trace with hash 73761868, now seen corresponding path program 1 times [2024-11-09 04:29:33,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:33,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311834190] [2024-11-09 04:29:33,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:33,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:33,552 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 04:29:33,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:33,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311834190] [2024-11-09 04:29:33,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311834190] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:33,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122537226] [2024-11-09 04:29:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:33,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:33,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:33,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:33,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:29:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:33,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:29:33,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:33,705 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 04:29:33,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:33,736 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 04:29:33,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122537226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:33,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [943596154] [2024-11-09 04:29:33,757 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 04:29:33,758 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:33,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:33,767 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:33,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:34,389 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:34,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [943596154] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:34,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:34,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2024-11-09 04:29:34,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802482552] [2024-11-09 04:29:34,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:34,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:29:34,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:34,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:29:34,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-11-09 04:29:34,498 INFO L87 Difference]: Start difference. First operand 40 states and 56 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:34,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:34,689 INFO L93 Difference]: Finished difference Result 91 states and 134 transitions. [2024-11-09 04:29:34,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:29:34,690 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-09 04:29:34,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:34,691 INFO L225 Difference]: With dead ends: 91 [2024-11-09 04:29:34,691 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 04:29:34,692 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-11-09 04:29:34,694 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:34,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 77 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:29:34,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 04:29:34,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2024-11-09 04:29:34,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 37 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 04:29:34,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2024-11-09 04:29:34,705 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 58 transitions. Word has length 17 [2024-11-09 04:29:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:34,706 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 58 transitions. [2024-11-09 04:29:34,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 58 transitions. [2024-11-09 04:29:34,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 04:29:34,707 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:34,707 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:34,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 04:29:34,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:34,908 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:34,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:34,909 INFO L85 PathProgramCache]: Analyzing trace with hash 187632713, now seen corresponding path program 1 times [2024-11-09 04:29:34,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:34,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933379753] [2024-11-09 04:29:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:34,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:29:34,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:34,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933379753] [2024-11-09 04:29:34,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933379753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:34,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672489648] [2024-11-09 04:29:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:34,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:34,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:34,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:35,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:29:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:35,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:29:35,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:35,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:29:35,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:29:35,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672489648] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:35,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1291829582] [2024-11-09 04:29:35,136 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 04:29:35,137 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:35,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:35,137 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:35,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:35,623 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2024-11-09 04:29:35,637 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:36,001 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '634#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1| Int)) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1|) |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1|))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:29:36,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:29:36,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:36,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 04:29:36,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607072764] [2024-11-09 04:29:36,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:36,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:29:36,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:36,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:29:36,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-11-09 04:29:36,006 INFO L87 Difference]: Start difference. First operand 42 states and 58 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:36,225 INFO L93 Difference]: Finished difference Result 137 states and 207 transitions. [2024-11-09 04:29:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:29:36,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 04:29:36,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:36,227 INFO L225 Difference]: With dead ends: 137 [2024-11-09 04:29:36,227 INFO L226 Difference]: Without dead ends: 100 [2024-11-09 04:29:36,228 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-11-09 04:29:36,229 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 138 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:36,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 115 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:29:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-09 04:29:36,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-11-09 04:29:36,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 89 states have (on average 1.4157303370786516) internal successors, (126), 89 states have internal predecessors, (126), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 04:29:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 144 transitions. [2024-11-09 04:29:36,248 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 144 transitions. Word has length 19 [2024-11-09 04:29:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:36,248 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 144 transitions. [2024-11-09 04:29:36,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 144 transitions. [2024-11-09 04:29:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:29:36,250 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:36,250 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:36,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 04:29:36,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:36,451 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:36,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:36,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1194352936, now seen corresponding path program 2 times [2024-11-09 04:29:36,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:36,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810766904] [2024-11-09 04:29:36,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:36,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 04:29:36,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:36,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810766904] [2024-11-09 04:29:36,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810766904] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:36,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197269799] [2024-11-09 04:29:36,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:29:36,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:36,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:36,652 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:36,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:29:36,729 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-09 04:29:36,729 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:29:36,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 04:29:36,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 04:29:36,772 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:29:36,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197269799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:29:36,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:29:36,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-09 04:29:36,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78787282] [2024-11-09 04:29:36,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:29:36,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:29:36,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:36,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:29:36,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:29:36,774 INFO L87 Difference]: Start difference. First operand 100 states and 144 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:36,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:36,877 INFO L93 Difference]: Finished difference Result 176 states and 257 transitions. [2024-11-09 04:29:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:29:36,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-09 04:29:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:36,879 INFO L225 Difference]: With dead ends: 176 [2024-11-09 04:29:36,880 INFO L226 Difference]: Without dead ends: 94 [2024-11-09 04:29:36,881 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:29:36,882 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:36,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 71 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:29:36,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-09 04:29:36,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-11-09 04:29:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 84 states have (on average 1.3928571428571428) internal successors, (117), 84 states have internal predecessors, (117), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 04:29:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 133 transitions. [2024-11-09 04:29:36,911 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 133 transitions. Word has length 25 [2024-11-09 04:29:36,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:36,911 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 133 transitions. [2024-11-09 04:29:36,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 133 transitions. [2024-11-09 04:29:36,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:29:36,915 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:36,915 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:36,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 04:29:37,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:37,116 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:37,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:37,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1262970125, now seen corresponding path program 1 times [2024-11-09 04:29:37,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:37,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870706204] [2024-11-09 04:29:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:37,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-09 04:29:37,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:37,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870706204] [2024-11-09 04:29:37,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870706204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:37,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425541350] [2024-11-09 04:29:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:37,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:37,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:37,220 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:37,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:29:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:37,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 04:29:37,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:29:37,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:29:37,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425541350] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:37,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032879642] [2024-11-09 04:29:37,487 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 04:29:37,487 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:37,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:37,488 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:37,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:37,791 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2024-11-09 04:29:37,804 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:38,136 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1594#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2| Int)) (and (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_2| 1) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_2| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_2| 4) (- 4)))))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:29:38,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:29:38,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:38,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-11-09 04:29:38,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584325219] [2024-11-09 04:29:38,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:38,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 04:29:38,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:38,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 04:29:38,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2024-11-09 04:29:38,139 INFO L87 Difference]: Start difference. First operand 94 states and 133 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:38,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:38,668 INFO L93 Difference]: Finished difference Result 302 states and 455 transitions. [2024-11-09 04:29:38,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 04:29:38,669 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-09 04:29:38,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:38,670 INFO L225 Difference]: With dead ends: 302 [2024-11-09 04:29:38,671 INFO L226 Difference]: Without dead ends: 218 [2024-11-09 04:29:38,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2024-11-09 04:29:38,677 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 556 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:38,677 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 207 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:29:38,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-09 04:29:38,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2024-11-09 04:29:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 196 states have (on average 1.413265306122449) internal successors, (277), 196 states have internal predecessors, (277), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-11-09 04:29:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 317 transitions. [2024-11-09 04:29:38,727 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 317 transitions. Word has length 25 [2024-11-09 04:29:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:38,728 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 317 transitions. [2024-11-09 04:29:38,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 317 transitions. [2024-11-09 04:29:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 04:29:38,733 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:38,733 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:38,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 04:29:38,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:38,934 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:38,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:38,935 INFO L85 PathProgramCache]: Analyzing trace with hash -631787570, now seen corresponding path program 2 times [2024-11-09 04:29:38,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:38,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652703247] [2024-11-09 04:29:38,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:38,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 04:29:39,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:39,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652703247] [2024-11-09 04:29:39,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652703247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:39,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496289187] [2024-11-09 04:29:39,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:29:39,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:39,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:39,293 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:39,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:29:39,375 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 04:29:39,375 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:29:39,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:29:39,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-09 04:29:39,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-09 04:29:39,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496289187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:39,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2017362152] [2024-11-09 04:29:39,516 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 04:29:39,516 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:39,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:39,517 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:39,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:39,762 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2024-11-09 04:29:39,771 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:40,090 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2589#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_3| 4) 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_3| 4)))) (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_3| 0))))' at error location [2024-11-09 04:29:40,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:29:40,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:40,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 21 [2024-11-09 04:29:40,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043805821] [2024-11-09 04:29:40,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:40,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 04:29:40,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:40,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 04:29:40,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=786, Unknown=0, NotChecked=0, Total=992 [2024-11-09 04:29:40,093 INFO L87 Difference]: Start difference. First operand 218 states and 317 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:41,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:41,678 INFO L93 Difference]: Finished difference Result 539 states and 837 transitions. [2024-11-09 04:29:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-09 04:29:41,679 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-09 04:29:41,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:41,681 INFO L225 Difference]: With dead ends: 539 [2024-11-09 04:29:41,682 INFO L226 Difference]: Without dead ends: 343 [2024-11-09 04:29:41,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1390, Invalid=4012, Unknown=0, NotChecked=0, Total=5402 [2024-11-09 04:29:41,685 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 608 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:41,686 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 272 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:29:41,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-11-09 04:29:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 325. [2024-11-09 04:29:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 299 states have (on average 1.2842809364548495) internal successors, (384), 299 states have internal predecessors, (384), 24 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-09 04:29:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 432 transitions. [2024-11-09 04:29:41,728 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 432 transitions. Word has length 39 [2024-11-09 04:29:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:41,728 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 432 transitions. [2024-11-09 04:29:41,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 21 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 432 transitions. [2024-11-09 04:29:41,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 04:29:41,729 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:41,729 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:41,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 04:29:41,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:41,930 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:41,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:41,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1337882252, now seen corresponding path program 3 times [2024-11-09 04:29:41,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:41,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919145014] [2024-11-09 04:29:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:41,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:29:42,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:42,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919145014] [2024-11-09 04:29:42,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919145014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:42,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398212803] [2024-11-09 04:29:42,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:29:42,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:42,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:42,277 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:42,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:29:42,377 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:29:42,377 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:29:42,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 04:29:42,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:29:42,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:29:42,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398212803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:42,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1296205986] [2024-11-09 04:29:42,877 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 04:29:42,879 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:42,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:42,882 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:42,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:43,135 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2024-11-09 04:29:43,146 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:43,401 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4247#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4| Int)) (and (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_4| 0) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| 4 (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_4| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_4| 4)))))))' at error location [2024-11-09 04:29:43,402 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:29:43,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:43,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2024-11-09 04:29:43,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914907248] [2024-11-09 04:29:43,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:43,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 04:29:43,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:43,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 04:29:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=516, Invalid=1044, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 04:29:43,404 INFO L87 Difference]: Start difference. First operand 325 states and 432 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:44,382 INFO L93 Difference]: Finished difference Result 917 states and 1284 transitions. [2024-11-09 04:29:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 04:29:44,382 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-09 04:29:44,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:44,389 INFO L225 Difference]: With dead ends: 917 [2024-11-09 04:29:44,391 INFO L226 Difference]: Without dead ends: 618 [2024-11-09 04:29:44,393 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=516, Invalid=1044, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 04:29:44,393 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 1107 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:44,394 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1158 Valid, 413 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 04:29:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2024-11-09 04:29:44,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 618. [2024-11-09 04:29:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 564 states have (on average 1.324468085106383) internal successors, (747), 564 states have internal predecessors, (747), 52 states have call successors, (52), 1 states have call predecessors, (52), 1 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2024-11-09 04:29:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 851 transitions. [2024-11-09 04:29:44,472 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 851 transitions. Word has length 51 [2024-11-09 04:29:44,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:44,473 INFO L471 AbstractCegarLoop]: Abstraction has 618 states and 851 transitions. [2024-11-09 04:29:44,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:44,473 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 851 transitions. [2024-11-09 04:29:44,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 04:29:44,475 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:44,475 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:44,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 04:29:44,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:44,676 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:44,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:44,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1118483346, now seen corresponding path program 4 times [2024-11-09 04:29:44,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:44,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403272605] [2024-11-09 04:29:44,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:44,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:29:45,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:45,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403272605] [2024-11-09 04:29:45,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403272605] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:45,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543340085] [2024-11-09 04:29:45,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:29:45,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:45,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:45,665 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:45,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:29:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:45,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 04:29:45,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:29:45,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:29:47,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543340085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:47,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152211173] [2024-11-09 04:29:47,170 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 04:29:47,172 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:47,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:47,172 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:47,173 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:47,448 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2024-11-09 04:29:47,458 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:48,113 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6986#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_5| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_5| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| (- 4) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_5| 4)))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_5| 1))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:29:48,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:29:48,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:48,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2024-11-09 04:29:48,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394046763] [2024-11-09 04:29:48,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:48,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-09 04:29:48,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:48,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-09 04:29:48,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1790, Invalid=2766, Unknown=0, NotChecked=0, Total=4556 [2024-11-09 04:29:48,118 INFO L87 Difference]: Start difference. First operand 618 states and 851 transitions. Second operand has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 56 states have internal predecessors, (125), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:29:51,158 INFO L93 Difference]: Finished difference Result 1770 states and 2543 transitions. [2024-11-09 04:29:51,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-09 04:29:51,158 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 56 states have internal predecessors, (125), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2024-11-09 04:29:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:29:51,164 INFO L225 Difference]: With dead ends: 1770 [2024-11-09 04:29:51,164 INFO L226 Difference]: Without dead ends: 1206 [2024-11-09 04:29:51,166 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1790, Invalid=2766, Unknown=0, NotChecked=0, Total=4556 [2024-11-09 04:29:51,167 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 3825 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3932 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:29:51,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3932 Valid, 610 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 04:29:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2024-11-09 04:29:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1206. [2024-11-09 04:29:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1096 states have (on average 1.3458029197080292) internal successors, (1475), 1096 states have internal predecessors, (1475), 108 states have call successors, (108), 1 states have call predecessors, (108), 1 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2024-11-09 04:29:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1691 transitions. [2024-11-09 04:29:51,302 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1691 transitions. Word has length 79 [2024-11-09 04:29:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:29:51,302 INFO L471 AbstractCegarLoop]: Abstraction has 1206 states and 1691 transitions. [2024-11-09 04:29:51,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.192982456140351) internal successors, (125), 56 states have internal predecessors, (125), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:29:51,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1691 transitions. [2024-11-09 04:29:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-09 04:29:51,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:29:51,305 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:29:51,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 04:29:51,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:51,506 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:29:51,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:29:51,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1131560606, now seen corresponding path program 5 times [2024-11-09 04:29:51,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:29:51,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954979665] [2024-11-09 04:29:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:29:51,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:29:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:29:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2952 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 04:29:54,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:29:54,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954979665] [2024-11-09 04:29:54,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954979665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:29:54,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622805064] [2024-11-09 04:29:54,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:29:54,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:29:54,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:29:54,744 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:29:54,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:29:54,920 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 04:29:54,920 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:29:54,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:29:54,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:29:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2952 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2024-11-09 04:29:55,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:29:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2952 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2916 trivial. 0 not checked. [2024-11-09 04:29:55,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622805064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:29:55,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [655377206] [2024-11-09 04:29:55,549 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 04:29:55,550 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:29:55,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:29:55,550 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:29:55,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:29:55,755 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2024-11-09 04:29:55,766 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:29:56,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12134#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 4) (- 4)))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 1))))' at error location [2024-11-09 04:29:56,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:29:56,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:29:56,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 10, 10] total 73 [2024-11-09 04:29:56,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453214774] [2024-11-09 04:29:56,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:29:56,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-09 04:29:56,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:29:56,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-09 04:29:56,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2044, Invalid=4928, Unknown=0, NotChecked=0, Total=6972 [2024-11-09 04:29:56,338 INFO L87 Difference]: Start difference. First operand 1206 states and 1691 transitions. Second operand has 73 states, 73 states have (on average 2.191780821917808) internal successors, (160), 73 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:40,651 INFO L93 Difference]: Finished difference Result 3031 states and 4365 transitions. [2024-11-09 04:30:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 479 states. [2024-11-09 04:30:40,651 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.191780821917808) internal successors, (160), 73 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2024-11-09 04:30:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:40,661 INFO L225 Difference]: With dead ends: 3031 [2024-11-09 04:30:40,661 INFO L226 Difference]: Without dead ends: 1935 [2024-11-09 04:30:40,683 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 879 GetRequests, 376 SyntacticMatches, 1 SemanticMatches, 502 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92955 ImplicationChecksByTransitivity, 39.6s TimeCoverageRelationStatistics Valid=73038, Invalid=180474, Unknown=0, NotChecked=0, Total=253512 [2024-11-09 04:30:40,684 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 8365 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8476 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:40,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8476 Valid, 642 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 1290 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 04:30:40,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2024-11-09 04:30:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1917. [2024-11-09 04:30:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1803 states have (on average 1.2179700499168054) internal successors, (2196), 1803 states have internal predecessors, (2196), 112 states have call successors, (112), 1 states have call predecessors, (112), 1 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2024-11-09 04:30:40,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2420 transitions. [2024-11-09 04:30:40,844 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2420 transitions. Word has length 135 [2024-11-09 04:30:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:40,845 INFO L471 AbstractCegarLoop]: Abstraction has 1917 states and 2420 transitions. [2024-11-09 04:30:40,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.191780821917808) internal successors, (160), 73 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2420 transitions. [2024-11-09 04:30:40,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-11-09 04:30:40,847 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:40,847 INFO L215 NwaCegarLoop]: trace histogram [56, 56, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:40,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 04:30:41,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:41,051 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:30:41,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:41,052 INFO L85 PathProgramCache]: Analyzing trace with hash -85093168, now seen corresponding path program 6 times [2024-11-09 04:30:41,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:41,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790662936] [2024-11-09 04:30:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:41,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3332 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-09 04:30:44,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:44,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790662936] [2024-11-09 04:30:44,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790662936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:44,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302495637] [2024-11-09 04:30:44,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:30:44,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:44,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:44,132 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:44,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:30:44,366 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:30:44,367 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:30:44,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-09 04:30:44,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3332 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-09 04:30:44,573 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3332 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-09 04:30:48,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302495637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:48,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [833823686] [2024-11-09 04:30:48,738 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 04:30:48,738 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:48,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:48,739 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:48,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:48,890 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2024-11-09 04:30:48,897 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:49,441 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21193#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_7| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (- 4) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_7| 4)))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_7| 1))))' at error location [2024-11-09 04:30:49,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:49,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:49,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 116 [2024-11-09 04:30:49,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712045957] [2024-11-09 04:30:49,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:49,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-11-09 04:30:49,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:49,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-11-09 04:30:49,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7160, Invalid=9096, Unknown=0, NotChecked=0, Total=16256 [2024-11-09 04:30:49,448 INFO L87 Difference]: Start difference. First operand 1917 states and 2420 transitions. Second operand has 117 states, 117 states have (on average 2.094017094017094) internal successors, (245), 116 states have internal predecessors, (245), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:06,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:06,313 INFO L93 Difference]: Finished difference Result 4937 states and 6580 transitions. [2024-11-09 04:31:06,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-09 04:31:06,314 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.094017094017094) internal successors, (245), 116 states have internal predecessors, (245), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2024-11-09 04:31:06,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:06,327 INFO L225 Difference]: With dead ends: 4937 [2024-11-09 04:31:06,327 INFO L226 Difference]: Without dead ends: 3134 [2024-11-09 04:31:06,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 394 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2528 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=7160, Invalid=9096, Unknown=0, NotChecked=0, Total=16256 [2024-11-09 04:31:06,333 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 10447 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 2302 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10674 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 3031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 2302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:06,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10674 Valid, 1160 Invalid, 3031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 2302 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-09 04:31:06,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2024-11-09 04:31:06,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 3134. [2024-11-09 04:31:06,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3134 states, 2904 states have (on average 1.2751377410468319) internal successors, (3703), 2904 states have internal predecessors, (3703), 228 states have call successors, (228), 1 states have call predecessors, (228), 1 states have return successors, (228), 228 states have call predecessors, (228), 228 states have call successors, (228) [2024-11-09 04:31:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3134 states to 3134 states and 4159 transitions. [2024-11-09 04:31:06,607 INFO L78 Accepts]: Start accepts. Automaton has 3134 states and 4159 transitions. Word has length 155 [2024-11-09 04:31:06,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:06,607 INFO L471 AbstractCegarLoop]: Abstraction has 3134 states and 4159 transitions. [2024-11-09 04:31:06,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.094017094017094) internal successors, (245), 116 states have internal predecessors, (245), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states and 4159 transitions. [2024-11-09 04:31:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2024-11-09 04:31:06,612 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:06,612 INFO L215 NwaCegarLoop]: trace histogram [114, 114, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:06,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 04:31:06,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 04:31:06,816 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:31:06,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:06,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1340051762, now seen corresponding path program 7 times [2024-11-09 04:31:06,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:06,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243656986] [2024-11-09 04:31:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:06,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13192 backedges. 0 proven. 12996 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-09 04:31:17,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:17,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243656986] [2024-11-09 04:31:17,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243656986] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:17,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136039736] [2024-11-09 04:31:17,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:31:17,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:17,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:31:17,088 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:31:17,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:31:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:17,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 1277 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-09 04:31:17,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:31:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13192 backedges. 0 proven. 12996 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-09 04:31:17,799 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:31:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 13192 backedges. 0 proven. 12996 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-09 04:31:34,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136039736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:31:34,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [572886749] [2024-11-09 04:31:34,368 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 04:31:34,368 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:31:34,369 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:31:34,369 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:31:34,369 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:31:34,530 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2024-11-09 04:31:34,536 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:31:35,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34734#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_8| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_8|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_8| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_8| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_8|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_8| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_8| 4) (- 4)))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_8| 1))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:31:35,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:31:35,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:31:35,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116, 116] total 232 [2024-11-09 04:31:35,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292346460] [2024-11-09 04:31:35,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:31:35,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 233 states [2024-11-09 04:31:35,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:35,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 233 interpolants. [2024-11-09 04:31:35,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27750, Invalid=31542, Unknown=0, NotChecked=0, Total=59292 [2024-11-09 04:31:35,278 INFO L87 Difference]: Start difference. First operand 3134 states and 4159 transitions. Second operand has 233 states, 233 states have (on average 2.0472103004291844) internal successors, (477), 232 states have internal predecessors, (477), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:34:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:34:25,330 INFO L93 Difference]: Finished difference Result 8474 states and 11799 transitions. [2024-11-09 04:34:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 232 states. [2024-11-09 04:34:25,331 INFO L78 Accepts]: Start accepts. Automaton has has 233 states, 233 states have (on average 2.0472103004291844) internal successors, (477), 232 states have internal predecessors, (477), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2024-11-09 04:34:25,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:34:25,359 INFO L225 Difference]: With dead ends: 8474 [2024-11-09 04:34:25,360 INFO L226 Difference]: Without dead ends: 5570 [2024-11-09 04:34:25,372 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 684 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5080 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=27750, Invalid=31542, Unknown=0, NotChecked=0, Total=59292 [2024-11-09 04:34:25,373 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 20757 mSDsluCounter, 2265 mSDsCounter, 0 mSdLazyCounter, 4676 mSolverCounterSat, 1398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21216 SdHoareTripleChecker+Valid, 2304 SdHoareTripleChecker+Invalid, 6074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1398 IncrementalHoareTripleChecker+Valid, 4676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:34:25,373 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21216 Valid, 2304 Invalid, 6074 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1398 Valid, 4676 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-11-09 04:34:25,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5570 states. [2024-11-09 04:34:25,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5570 to 5570. [2024-11-09 04:34:25,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5108 states have (on average 1.3153876272513705) internal successors, (6719), 5108 states have internal predecessors, (6719), 460 states have call successors, (460), 1 states have call predecessors, (460), 1 states have return successors, (460), 460 states have call predecessors, (460), 460 states have call successors, (460) [2024-11-09 04:34:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 7639 transitions. [2024-11-09 04:34:25,925 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 7639 transitions. Word has length 271 [2024-11-09 04:34:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:34:25,926 INFO L471 AbstractCegarLoop]: Abstraction has 5570 states and 7639 transitions. [2024-11-09 04:34:25,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 233 states, 233 states have (on average 2.0472103004291844) internal successors, (477), 232 states have internal predecessors, (477), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:34:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 7639 transitions. [2024-11-09 04:34:25,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2024-11-09 04:34:25,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:34:25,939 INFO L215 NwaCegarLoop]: trace histogram [230, 230, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:34:25,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 04:34:26,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:34:26,140 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 04:34:26,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:34:26,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1327608566, now seen corresponding path program 8 times [2024-11-09 04:34:26,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:34:26,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699560873] [2024-11-09 04:34:26,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:34:26,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:34:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:35:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 53096 backedges. 0 proven. 52900 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-09 04:35:03,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:35:03,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699560873] [2024-11-09 04:35:03,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699560873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:35:03,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562804891] [2024-11-09 04:35:03,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:35:03,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:35:03,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:35:04,000 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:35:04,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62593189-92f9-4ae7-8e3a-e2dda61f5f0f/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 04:35:04,623 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-09 04:35:04,623 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:35:04,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 04:35:04,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:35:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 53096 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 52900 trivial. 0 not checked. [2024-11-09 04:35:06,210 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:35:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 53096 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 52900 trivial. 0 not checked. [2024-11-09 04:35:08,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562804891] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:35:08,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1534119328] [2024-11-09 04:35:08,210 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 04:35:08,210 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:35:08,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:35:08,211 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:35:08,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:35:08,385 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2024-11-09 04:35:08,394 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:35:09,786 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '58224#(and (exists ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_9| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_9|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_9| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_9| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_9|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_9| (- 4) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_9| 4)))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_9| 1))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 04:35:09,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:35:09,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:35:09,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [232, 18, 18] total 265 [2024-11-09 04:35:09,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871925503] [2024-11-09 04:35:09,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:35:09,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 265 states [2024-11-09 04:35:09,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:35:09,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 265 interpolants. [2024-11-09 04:35:09,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28748, Invalid=47152, Unknown=0, NotChecked=0, Total=75900 [2024-11-09 04:35:09,806 INFO L87 Difference]: Start difference. First operand 5570 states and 7639 transitions. Second operand has 265 states, 265 states have (on average 2.0528301886792453) internal successors, (544), 265 states have internal predecessors, (544), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)