./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:21:29,892 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:21:30,000 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:21:30,007 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:21:30,011 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:21:30,063 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:21:30,065 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:21:30,066 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:21:30,066 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:21:30,066 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:21:30,066 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:21:30,067 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:21:30,067 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:21:30,067 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:21:30,067 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:21:30,067 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:21:30,067 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:21:30,067 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:21:30,067 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:21:30,070 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:21:30,071 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:21:30,071 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:21:30,072 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:21:30,072 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:21:30,072 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:21:30,073 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:21:30,073 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:21:30,073 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:21:30,073 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:21:30,073 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:21:30,073 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:21:30,074 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:21:30,074 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:21:30,074 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:21:30,075 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:21:30,075 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:21:30,075 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:21:30,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:21:30,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:21:30,076 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:21:30,076 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:21:30,076 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:21:30,077 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:21:30,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:21:30,077 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:21:30,077 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:21:30,077 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:21:30,077 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a814f1cabb0a814aaaa0ad04ef0792a07c6fb7c73876a2da6ae85372115ff6c [2024-11-14 04:21:30,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:21:30,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:21:30,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:21:30,503 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:21:30,503 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:21:30,505 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i Unable to find full path for "g++" [2024-11-14 04:21:32,701 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:21:33,285 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:21:33,285 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i [2024-11-14 04:21:33,321 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/data/7dad56b96/89818f65e1a74ba5b8c078bf1fddafee/FLAG59bf9c252 [2024-11-14 04:21:33,344 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/data/7dad56b96/89818f65e1a74ba5b8c078bf1fddafee [2024-11-14 04:21:33,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:21:33,349 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:21:33,351 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:21:33,351 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:21:33,357 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:21:33,358 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:21:33" (1/1) ... [2024-11-14 04:21:33,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49874d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:21:33, skipping insertion in model container [2024-11-14 04:21:33,360 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:21:33" (1/1) ... [2024-11-14 04:21:33,429 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:21:33,945 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_102fe894-2e35-4d66-99d8-72eaa0ae45ae/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[33021,33034] [2024-11-14 04:21:34,121 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_102fe894-2e35-4d66-99d8-72eaa0ae45ae/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[44590,44603] [2024-11-14 04:21:34,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:21:34,157 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:21:34,203 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_102fe894-2e35-4d66-99d8-72eaa0ae45ae/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[33021,33034] [2024-11-14 04:21:34,306 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_102fe894-2e35-4d66-99d8-72eaa0ae45ae/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test3-1.i[44590,44603] [2024-11-14 04:21:34,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:21:34,365 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:21:34,365 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:21:34 WrapperNode [2024-11-14 04:21:34,366 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:21:34,368 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:21:34,368 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:21:34,368 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:21:34,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:21:34" (1/1) ... [2024-11-14 04:21:34,413 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:21:34" (1/1) ... [2024-11-14 04:21:34,511 INFO L138 Inliner]: procedures = 177, calls = 277, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1420 [2024-11-14 04:21:34,512 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:21:34,512 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:21:34,512 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:21:34,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:21:34,523 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:21:34" (1/1) ... [2024-11-14 04:21:34,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:21:34" (1/1) ... [2024-11-14 04:21:34,545 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:21:34" (1/1) ... [2024-11-14 04:21:34,546 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:21:34" (1/1) ... [2024-11-14 04:21:34,613 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:21:34" (1/1) ... [2024-11-14 04:21:34,628 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:21:34" (1/1) ... [2024-11-14 04:21:34,637 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:21:34" (1/1) ... [2024-11-14 04:21:34,646 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:21:34" (1/1) ... [2024-11-14 04:21:34,667 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:21:34,668 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:21:34,668 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:21:34,668 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:21:34,673 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:21:34" (1/1) ... [2024-11-14 04:21:34,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:21:34,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:21:34,729 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:21:34,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:21:34,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:21:34,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 04:21:34,769 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 04:21:34,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:21:34,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2024-11-14 04:21:34,769 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2024-11-14 04:21:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 04:21:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:21:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 04:21:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:21:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 04:21:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:21:34,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:21:34,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:21:34,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:21:35,101 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:21:35,104 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:21:37,340 INFO L? ?]: Removed 316 outVars from TransFormulas that were not future-live. [2024-11-14 04:21:37,341 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:21:39,487 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:21:39,487 INFO L316 CfgBuilder]: Removed 63 assume(true) statements. [2024-11-14 04:21:39,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:21:39 BoogieIcfgContainer [2024-11-14 04:21:39,487 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:21:39,491 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:21:39,493 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:21:39,500 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:21:39,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:21:33" (1/3) ... [2024-11-14 04:21:39,501 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e37e321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:21:39, skipping insertion in model container [2024-11-14 04:21:39,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:21:34" (2/3) ... [2024-11-14 04:21:39,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e37e321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:21:39, skipping insertion in model container [2024-11-14 04:21:39,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:21:39" (3/3) ... [2024-11-14 04:21:39,503 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test3-1.i [2024-11-14 04:21:39,525 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:21:39,527 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG uthash_OAT_test3-1.i that has 3 procedures, 131 locations, 1 initial locations, 36 loop locations, and 2 error locations. [2024-11-14 04:21:39,610 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:21:39,633 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;@7af3ef52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:21:39,634 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 04:21:39,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 118 states have (on average 1.7457627118644068) internal successors, (206), 125 states have internal predecessors, (206), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 04:21:39,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 04:21:39,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:21:39,652 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:21:39,653 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:21:39,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:21:39,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1354896368, now seen corresponding path program 1 times [2024-11-14 04:21:39,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:21:39,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208174245] [2024-11-14 04:21:39,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:39,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:21:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:21:39,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:39,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208174245] [2024-11-14 04:21:39,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208174245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:21:39,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:21:39,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:21:39,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633929779] [2024-11-14 04:21:39,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:21:39,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 04:21:39,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:39,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 04:21:39,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 04:21:39,957 INFO L87 Difference]: Start difference. First operand has 131 states, 118 states have (on average 1.7457627118644068) internal successors, (206), 125 states have internal predecessors, (206), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:41,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:21:43,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:21:45,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:21:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:21:45,995 INFO L93 Difference]: Finished difference Result 261 states and 448 transitions. [2024-11-14 04:21:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 04:21:45,999 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 04:21:45,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:21:46,007 INFO L225 Difference]: With dead ends: 261 [2024-11-14 04:21:46,007 INFO L226 Difference]: Without dead ends: 130 [2024-11-14 04:21:46,010 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 04:21:46,013 INFO L432 NwaCegarLoop]: 133 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:21:46,013 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 133 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2024-11-14 04:21:46,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-14 04:21:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2024-11-14 04:21:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.2033898305084745) internal successors, (142), 124 states have internal predecessors, (142), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 04:21:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2024-11-14 04:21:46,052 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 8 [2024-11-14 04:21:46,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:21:46,052 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2024-11-14 04:21:46,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:46,053 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2024-11-14 04:21:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 04:21:46,054 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:21:46,054 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:21:46,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:21:46,055 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:21:46,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:21:46,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1441671498, now seen corresponding path program 1 times [2024-11-14 04:21:46,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:21:46,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036995699] [2024-11-14 04:21:46,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:46,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:21:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:21:46,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:46,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036995699] [2024-11-14 04:21:46,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036995699] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:21:46,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:21:46,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:21:46,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005386142] [2024-11-14 04:21:46,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:21:46,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:21:46,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:46,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:21:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:21:46,292 INFO L87 Difference]: Start difference. First operand 130 states and 158 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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) [2024-11-14 04:21:48,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:21:50,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:21:53,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:21:55,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:21:57,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:21:58,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:02,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:22:03,414 INFO L93 Difference]: Finished difference Result 275 states and 343 transitions. [2024-11-14 04:22:03,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:22:03,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 [2024-11-14 04:22:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:22:03,419 INFO L225 Difference]: With dead ends: 275 [2024-11-14 04:22:03,419 INFO L226 Difference]: Without dead ends: 202 [2024-11-14 04:22:03,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:22:03,421 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 78 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:22:03,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 353 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 5 Unknown, 0 Unchecked, 17.1s Time] [2024-11-14 04:22:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-14 04:22:03,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 132. [2024-11-14 04:22:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 120 states have (on average 1.2) internal successors, (144), 126 states have internal predecessors, (144), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 04:22:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 160 transitions. [2024-11-14 04:22:03,435 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 160 transitions. Word has length 13 [2024-11-14 04:22:03,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:22:03,436 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 160 transitions. [2024-11-14 04:22:03,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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) [2024-11-14 04:22:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 160 transitions. [2024-11-14 04:22:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-14 04:22:03,437 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:22:03,437 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:22:03,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:22:03,438 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:22:03,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:22:03,438 INFO L85 PathProgramCache]: Analyzing trace with hash 260870038, now seen corresponding path program 1 times [2024-11-14 04:22:03,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:22:03,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917142881] [2024-11-14 04:22:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:22:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:22:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:22:03,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:22:03,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917142881] [2024-11-14 04:22:03,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917142881] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:22:03,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:22:03,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:22:03,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842629466] [2024-11-14 04:22:03,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:22:03,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:22:03,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:22:03,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:22:03,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:22:03,811 INFO L87 Difference]: Start difference. First operand 132 states and 160 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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) [2024-11-14 04:22:05,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:07,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:09,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:11,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:14,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:16,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:18,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:20,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:22,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:24,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:26,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2024-11-14 04:22:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:22:26,196 INFO L93 Difference]: Finished difference Result 312 states and 375 transitions. [2024-11-14 04:22:26,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:22:26,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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 41 [2024-11-14 04:22:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:22:26,204 INFO L225 Difference]: With dead ends: 312 [2024-11-14 04:22:26,204 INFO L226 Difference]: Without dead ends: 183 [2024-11-14 04:22:26,205 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 [2024-11-14 04:22:26,205 INFO L432 NwaCegarLoop]: 143 mSDtfsCounter, 41 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:22:26,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 261 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 10 Unknown, 0 Unchecked, 22.4s Time] [2024-11-14 04:22:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-11-14 04:22:26,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2024-11-14 04:22:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 167 states have (on average 1.1796407185628743) internal successors, (197), 173 states have internal predecessors, (197), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 04:22:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 213 transitions. [2024-11-14 04:22:26,224 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 213 transitions. Word has length 41 [2024-11-14 04:22:26,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:22:26,225 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 213 transitions. [2024-11-14 04:22:26,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 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) [2024-11-14 04:22:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 213 transitions. [2024-11-14 04:22:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 04:22:26,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:22:26,228 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:22:26,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:22:26,228 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:22:26,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:22:26,229 INFO L85 PathProgramCache]: Analyzing trace with hash -414803643, now seen corresponding path program 1 times [2024-11-14 04:22:26,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:22:26,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177054287] [2024-11-14 04:22:26,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:22:26,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:22:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:22:26,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:22:26,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177054287] [2024-11-14 04:22:26,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177054287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:22:26,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:22:26,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:22:26,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125523781] [2024-11-14 04:22:26,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:22:26,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:22:26,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:22:26,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:22:26,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:22:26,983 INFO L87 Difference]: Start difference. First operand 179 states and 213 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:22:29,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:30,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:32,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:35,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:36,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:38,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:40,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:43,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:45,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:47,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:49,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:51,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:52,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:22:52,801 INFO L93 Difference]: Finished difference Result 248 states and 302 transitions. [2024-11-14 04:22:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:22:52,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2024-11-14 04:22:52,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:22:52,808 INFO L225 Difference]: With dead ends: 248 [2024-11-14 04:22:52,808 INFO L226 Difference]: Without dead ends: 229 [2024-11-14 04:22:52,808 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:22:52,809 INFO L432 NwaCegarLoop]: 123 mSDtfsCounter, 64 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:22:52,810 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 354 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 9 Unknown, 0 Unchecked, 25.8s Time] [2024-11-14 04:22:52,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-14 04:22:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 181. [2024-11-14 04:22:52,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 169 states have (on average 1.1775147928994083) internal successors, (199), 175 states have internal predecessors, (199), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 04:22:52,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2024-11-14 04:22:52,826 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 54 [2024-11-14 04:22:52,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:22:52,826 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2024-11-14 04:22:52,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:22:52,827 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2024-11-14 04:22:52,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-14 04:22:52,828 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:22:52,828 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:22:52,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:22:52,829 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:22:52,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:22:52,829 INFO L85 PathProgramCache]: Analyzing trace with hash 900061503, now seen corresponding path program 1 times [2024-11-14 04:22:52,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:22:52,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278382085] [2024-11-14 04:22:52,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:22:52,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:22:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:22:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:22:53,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:22:53,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278382085] [2024-11-14 04:22:53,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278382085] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:22:53,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:22:53,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:22:53,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771607752] [2024-11-14 04:22:53,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:22:53,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:22:53,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:22:53,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:22:53,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:22:53,340 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:22:55,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:57,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:22:59,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:23:01,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:23:03,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:23:05,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:23:08,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:23:10,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:23:11,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:23:11,823 INFO L93 Difference]: Finished difference Result 410 states and 497 transitions. [2024-11-14 04:23:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:23:11,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2024-11-14 04:23:11,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:23:11,834 INFO L225 Difference]: With dead ends: 410 [2024-11-14 04:23:11,834 INFO L226 Difference]: Without dead ends: 246 [2024-11-14 04:23:11,835 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:23:11,836 INFO L432 NwaCegarLoop]: 146 mSDtfsCounter, 249 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:23:11,837 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 290 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 8 Unknown, 0 Unchecked, 18.4s Time] [2024-11-14 04:23:11,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2024-11-14 04:23:11,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 230. [2024-11-14 04:23:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 218 states have (on average 1.1788990825688073) internal successors, (257), 224 states have internal predecessors, (257), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 04:23:11,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 273 transitions. [2024-11-14 04:23:11,860 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 273 transitions. Word has length 63 [2024-11-14 04:23:11,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:23:11,860 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 273 transitions. [2024-11-14 04:23:11,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:23:11,861 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 273 transitions. [2024-11-14 04:23:11,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 04:23:11,863 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:23:11,863 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:23:11,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:23:11,863 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:23:11,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:23:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash -229125370, now seen corresponding path program 1 times [2024-11-14 04:23:11,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:23:11,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484406388] [2024-11-14 04:23:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:23:11,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:23:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:23:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:23:13,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:23:13,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484406388] [2024-11-14 04:23:13,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484406388] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:23:13,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204374004] [2024-11-14 04:23:13,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:23:13,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:23:13,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:23:13,494 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:23:13,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:23:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:23:32,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 137 conjuncts are in the unsatisfiable core [2024-11-14 04:23:32,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:23:32,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-14 04:23:32,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:23:32,809 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-14 04:23:32,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-14 04:23:32,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-14 04:23:32,872 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-14 04:23:32,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-14 04:23:33,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 04:23:33,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 04:23:33,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-14 04:23:33,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-14 04:23:33,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:23:33,311 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2024-11-14 04:23:33,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 45 [2024-11-14 04:23:33,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2024-11-14 04:23:33,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 04:23:33,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 04:23:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:23:33,918 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:23:33,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204374004] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:23:33,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:23:33,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2024-11-14 04:23:33,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353191913] [2024-11-14 04:23:33,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:23:33,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:23:33,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:23:33,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:23:33,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:23:33,920 INFO L87 Difference]: Start difference. First operand 230 states and 273 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:23:36,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:23:38,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:23:40,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:23:42,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:23:44,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:23:47,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:23:49,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:23:51,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:23:53,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:23:55,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:23:57,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:23:59,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:24:01,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:24:03,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:24:05,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:24:07,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:24:09,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:24:11,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:24:13,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:24:15,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:24:17,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:24:19,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:24:21,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:24:23,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 04:24:25,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:24:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:24:26,144 INFO L93 Difference]: Finished difference Result 443 states and 528 transitions. [2024-11-14 04:24:26,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:24:26,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2024-11-14 04:24:26,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:24:26,149 INFO L225 Difference]: With dead ends: 443 [2024-11-14 04:24:26,149 INFO L226 Difference]: Without dead ends: 232 [2024-11-14 04:24:26,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:24:26,151 INFO L432 NwaCegarLoop]: 125 mSDtfsCounter, 8 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:24:26,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 323 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 24 Unknown, 0 Unchecked, 52.2s Time] [2024-11-14 04:24:26,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-14 04:24:26,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-11-14 04:24:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 220 states have (on average 1.1772727272727272) internal successors, (259), 225 states have internal predecessors, (259), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 04:24:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 275 transitions. [2024-11-14 04:24:26,174 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 275 transitions. Word has length 71 [2024-11-14 04:24:26,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:24:26,175 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 275 transitions. [2024-11-14 04:24:26,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:24:26,175 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 275 transitions. [2024-11-14 04:24:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-14 04:24:26,177 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:24:26,177 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:24:26,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:24:26,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 04:24:26,378 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:24:26,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:24:26,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1151133332, now seen corresponding path program 1 times [2024-11-14 04:24:26,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:24:26,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441964975] [2024-11-14 04:24:26,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:24:26,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:24:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:24:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:24:28,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:24:28,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441964975] [2024-11-14 04:24:28,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441964975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:24:28,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309260552] [2024-11-14 04:24:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:24:28,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:24:28,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:24:28,376 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:24:28,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:24:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:24:45,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:24:45,773 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:24:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:24:45,808 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:24:45,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309260552] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:24:45,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:24:45,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-11-14 04:24:45,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994271826] [2024-11-14 04:24:45,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:24:45,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:24:45,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:24:45,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:24:45,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:24:45,811 INFO L87 Difference]: Start difference. First operand 232 states and 275 transitions. Second operand has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 4 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:24:47,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:24:49,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:24:51,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:24:53,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:24:55,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:24:57,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:25:00,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:25:02,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:25:04,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:25:06,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:25:08,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:25:10,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-14 04:25:10,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:25:10,719 INFO L93 Difference]: Finished difference Result 441 states and 526 transitions. [2024-11-14 04:25:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:25:10,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 4 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 72 [2024-11-14 04:25:10,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:25:10,729 INFO L225 Difference]: With dead ends: 441 [2024-11-14 04:25:10,729 INFO L226 Difference]: Without dead ends: 234 [2024-11-14 04:25:10,730 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:25:10,731 INFO L432 NwaCegarLoop]: 131 mSDtfsCounter, 0 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:25:10,731 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 389 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 12 Unknown, 0 Unchecked, 24.9s Time] [2024-11-14 04:25:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-11-14 04:25:10,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2024-11-14 04:25:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 221 states have (on average 1.1809954751131222) internal successors, (261), 227 states have internal predecessors, (261), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-14 04:25:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 278 transitions. [2024-11-14 04:25:10,749 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 278 transitions. Word has length 72 [2024-11-14 04:25:10,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:25:10,749 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 278 transitions. [2024-11-14 04:25:10,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 22.666666666666668) internal successors, (68), 4 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:25:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 278 transitions. [2024-11-14 04:25:10,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-14 04:25:10,751 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:25:10,752 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:25:10,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:25:10,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 04:25:10,952 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:25:10,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:25:10,953 INFO L85 PathProgramCache]: Analyzing trace with hash 604568232, now seen corresponding path program 2 times [2024-11-14 04:25:10,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:25:10,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096720172] [2024-11-14 04:25:10,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:25:10,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:25:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:25:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:25:12,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:25:12,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096720172] [2024-11-14 04:25:12,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096720172] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:25:12,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062986403] [2024-11-14 04:25:12,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:25:12,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:25:12,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:25:12,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:25:12,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_102fe894-2e35-4d66-99d8-72eaa0ae45ae/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process