./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.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_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/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_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/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_10353e98-a8a7-4990-be23-dd6cfdc6da18/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 49403db555b72e8190819e443264a1fc2796f8e39e39a8e1b1a8f1697d9e5642 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:11:27,125 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:11:27,245 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:11:27,253 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:11:27,253 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:11:27,288 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:11:27,289 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:11:27,290 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:11:27,290 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:11:27,291 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:11:27,292 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:11:27,293 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:11:27,293 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:11:27,293 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:11:27,293 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:11:27,293 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:11:27,293 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:11:27,294 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:11:27,294 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:11:27,294 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:11:27,294 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:11:27,294 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:11:27,295 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:11:27,295 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:11:27,295 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:11:27,295 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:11:27,295 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:11:27,295 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:11:27,295 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:11:27,296 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:11:27,297 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:11:27,297 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:11:27,298 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:11:27,298 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:11:27,299 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:11:27,299 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:11:27,299 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:11:27,299 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:11:27,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:11:27,300 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:11:27,300 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:11:27,300 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:11:27,300 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:11:27,300 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:11:27,301 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:11:27,301 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:11:27,302 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:11:27,302 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_10353e98-a8a7-4990-be23-dd6cfdc6da18/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 -> 49403db555b72e8190819e443264a1fc2796f8e39e39a8e1b1a8f1697d9e5642 [2024-11-14 04:11:27,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:11:27,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:11:27,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:11:27,776 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:11:27,777 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:11:27,781 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i Unable to find full path for "g++" [2024-11-14 04:11:30,319 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:11:30,682 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:11:30,683 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i [2024-11-14 04:11:30,694 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/data/2758c99c9/9a0e3195c71449a3a96a02f1f114425b/FLAGc08f1e669 [2024-11-14 04:11:30,744 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/data/2758c99c9/9a0e3195c71449a3a96a02f1f114425b [2024-11-14 04:11:30,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:11:30,754 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:11:30,760 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:11:30,760 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:11:30,768 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:11:30,770 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:11:30" (1/1) ... [2024-11-14 04:11:30,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78e9b069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:30, skipping insertion in model container [2024-11-14 04:11:30,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:11:30" (1/1) ... [2024-11-14 04:11:30,798 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:11:30,995 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_10353e98-a8a7-4990-be23-dd6cfdc6da18/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i[823,836] [2024-11-14 04:11:31,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:11:31,034 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:11:31,049 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_10353e98-a8a7-4990-be23-dd6cfdc6da18/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-2.i[823,836] [2024-11-14 04:11:31,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:11:31,106 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:11:31,107 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:31 WrapperNode [2024-11-14 04:11:31,107 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:11:31,108 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:11:31,109 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:11:31,110 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:11:31,119 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:31" (1/1) ... [2024-11-14 04:11:31,128 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:31" (1/1) ... [2024-11-14 04:11:31,151 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 109 [2024-11-14 04:11:31,151 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:11:31,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:11:31,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:11:31,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:11:31,159 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:31" (1/1) ... [2024-11-14 04:11:31,159 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:31" (1/1) ... [2024-11-14 04:11:31,162 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:31" (1/1) ... [2024-11-14 04:11:31,162 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:31" (1/1) ... [2024-11-14 04:11:31,169 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:31" (1/1) ... [2024-11-14 04:11:31,175 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:31" (1/1) ... [2024-11-14 04:11:31,177 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:31" (1/1) ... [2024-11-14 04:11:31,178 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:31" (1/1) ... [2024-11-14 04:11:31,180 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:11:31,181 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:11:31,181 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:11:31,182 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:11:31,183 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:31" (1/1) ... [2024-11-14 04:11:31,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:11:31,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:31,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:11:31,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:11:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:11:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:11:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:11:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:11:31,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:11:31,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:11:31,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:11:31,277 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 04:11:31,278 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 04:11:31,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:11:31,382 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:11:31,384 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:11:31,721 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-11-14 04:11:31,721 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:11:31,881 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:11:31,881 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-14 04:11:31,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:11:31 BoogieIcfgContainer [2024-11-14 04:11:31,882 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:11:31,887 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:11:31,888 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:11:31,896 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:11:31,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:11:30" (1/3) ... [2024-11-14 04:11:31,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58de3c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:11:31, skipping insertion in model container [2024-11-14 04:11:31,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:11:31" (2/3) ... [2024-11-14 04:11:31,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58de3c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:11:31, skipping insertion in model container [2024-11-14 04:11:31,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:11:31" (3/3) ... [2024-11-14 04:11:31,902 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2024-11-14 04:11:31,928 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:11:31,933 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sorting_selectionsort_ground-2.i that has 2 procedures, 22 locations, 1 initial locations, 8 loop locations, and 1 error locations. [2024-11-14 04:11:32,026 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:11:32,053 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;@b41e5e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:11:32,053 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:11:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:11:32,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 04:11:32,076 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:32,077 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:32,078 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:32,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:32,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1628335356, now seen corresponding path program 1 times [2024-11-14 04:11:32,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:32,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589662273] [2024-11-14 04:11:32,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:32,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:32,497 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 04:11:32,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:32,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589662273] [2024-11-14 04:11:32,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589662273] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:32,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:11:32,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:11:32,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474809279] [2024-11-14 04:11:32,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:32,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:11:32,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:32,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:11:32,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:11:32,553 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 04:11:32,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:32,678 INFO L93 Difference]: Finished difference Result 43 states and 66 transitions. [2024-11-14 04:11:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:11:32,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2024-11-14 04:11:32,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:32,697 INFO L225 Difference]: With dead ends: 43 [2024-11-14 04:11:32,698 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 04:11:32,702 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 04:11:32,706 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:32,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:11:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 04:11:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-14 04:11:32,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:11:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2024-11-14 04:11:32,753 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 9 [2024-11-14 04:11:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:32,754 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2024-11-14 04:11:32,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 04:11:32,754 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2024-11-14 04:11:32,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 04:11:32,756 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:32,756 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:32,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:11:32,757 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:32,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:32,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1930013928, now seen corresponding path program 1 times [2024-11-14 04:11:32,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:32,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007219164] [2024-11-14 04:11:32,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:32,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:32,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:32,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007219164] [2024-11-14 04:11:32,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007219164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:32,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845265203] [2024-11-14 04:11:32,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:32,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:32,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:32,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:11:32,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:11:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:33,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:11:33,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:11:33,143 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:11:33,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845265203] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:33,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:11:33,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-14 04:11:33,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878562225] [2024-11-14 04:11:33,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:33,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:11:33,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:33,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:11:33,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:11:33,151 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 04:11:33,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:33,249 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2024-11-14 04:11:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:11:33,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2024-11-14 04:11:33,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:33,252 INFO L225 Difference]: With dead ends: 41 [2024-11-14 04:11:33,253 INFO L226 Difference]: Without dead ends: 31 [2024-11-14 04:11:33,253 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:11:33,255 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:33,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:11:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-14 04:11:33,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2024-11-14 04:11:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:11:33,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2024-11-14 04:11:33,274 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 10 [2024-11-14 04:11:33,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:33,276 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2024-11-14 04:11:33,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 04:11:33,277 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2024-11-14 04:11:33,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:11:33,278 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:33,278 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:33,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:11:33,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-14 04:11:33,484 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:33,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:33,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1681072888, now seen corresponding path program 1 times [2024-11-14 04:11:33,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:33,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309401658] [2024-11-14 04:11:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:33,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:33,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:33,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309401658] [2024-11-14 04:11:33,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309401658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:33,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156251552] [2024-11-14 04:11:33,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:33,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:33,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:33,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:11:33,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:11:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:33,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:11:33,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:33,838 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:11:33,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156251552] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:11:33,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1640009951] [2024-11-14 04:11:33,921 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:11:33,922 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:11:33,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:11:33,934 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:11:33,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:11:34,617 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:11:34,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1640009951] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:34,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:11:34,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2024-11-14 04:11:34,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709352183] [2024-11-14 04:11:34,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:34,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:11:34,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:11:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:11:34,761 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 04:11:35,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:35,002 INFO L93 Difference]: Finished difference Result 51 states and 75 transitions. [2024-11-14 04:11:35,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:11:35,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 11 [2024-11-14 04:11:35,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:35,006 INFO L225 Difference]: With dead ends: 51 [2024-11-14 04:11:35,006 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 04:11:35,007 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:11:35,011 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:35,011 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 42 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:11:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 04:11:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2024-11-14 04:11:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-14 04:11:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2024-11-14 04:11:35,028 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 11 [2024-11-14 04:11:35,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:35,028 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2024-11-14 04:11:35,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 04:11:35,028 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2024-11-14 04:11:35,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 04:11:35,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:35,032 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:35,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:11:35,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:35,233 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:35,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:35,234 INFO L85 PathProgramCache]: Analyzing trace with hash 162425200, now seen corresponding path program 1 times [2024-11-14 04:11:35,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:35,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140205046] [2024-11-14 04:11:35,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:35,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:11:35,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:35,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140205046] [2024-11-14 04:11:35,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140205046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:35,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506697449] [2024-11-14 04:11:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:35,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:35,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:35,438 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:11:35,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:11:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:35,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:11:35,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:11:35,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:11:35,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506697449] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:11:35,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [589742070] [2024-11-14 04:11:35,605 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 04:11:35,605 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:11:35,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:11:35,606 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:11:35,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:11:36,084 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2024-11-14 04:11:36,092 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:11:36,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [589742070] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:11:36,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:11:36,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [3, 3, 3] total 14 [2024-11-14 04:11:36,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384323755] [2024-11-14 04:11:36,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:11:36,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 04:11:36,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:36,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 04:11:36,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-14 04:11:36,284 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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 04:11:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:36,669 INFO L93 Difference]: Finished difference Result 66 states and 96 transitions. [2024-11-14 04:11:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:11:36,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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 12 [2024-11-14 04:11:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:36,671 INFO L225 Difference]: With dead ends: 66 [2024-11-14 04:11:36,671 INFO L226 Difference]: Without dead ends: 47 [2024-11-14 04:11:36,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-14 04:11:36,673 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:36,674 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 78 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:11:36,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-14 04:11:36,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2024-11-14 04:11:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 27 states have internal predecessors, (36), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 04:11:36,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2024-11-14 04:11:36,688 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 12 [2024-11-14 04:11:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:36,689 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2024-11-14 04:11:36,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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 04:11:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2024-11-14 04:11:36,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 04:11:36,690 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:36,690 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:36,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:11:36,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:36,895 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:36,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:36,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1996960246, now seen corresponding path program 1 times [2024-11-14 04:11:36,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:36,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063422347] [2024-11-14 04:11:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:36,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:11:37,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:37,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063422347] [2024-11-14 04:11:37,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063422347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:37,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596889998] [2024-11-14 04:11:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:37,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:37,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:37,085 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:11:37,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:11:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:37,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:11:37,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:11:37,216 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:11:37,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596889998] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:11:37,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [392270143] [2024-11-14 04:11:37,265 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:11:37,265 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:11:37,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:11:37,266 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:11:37,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:11:37,867 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 04:11:37,878 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:11:38,091 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '832#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 04:11:38,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:11:38,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:11:38,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2024-11-14 04:11:38,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263003925] [2024-11-14 04:11:38,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:11:38,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:11:38,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:38,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:11:38,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-14 04:11:38,097 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:11:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:38,184 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2024-11-14 04:11:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:11:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-11-14 04:11:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:38,188 INFO L225 Difference]: With dead ends: 66 [2024-11-14 04:11:38,188 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 04:11:38,189 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-14 04:11:38,190 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:38,191 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:11:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 04:11:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-14 04:11:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 04:11:38,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2024-11-14 04:11:38,203 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 19 [2024-11-14 04:11:38,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:38,204 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2024-11-14 04:11:38,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:11:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2024-11-14 04:11:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 04:11:38,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:38,206 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:38,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 04:11:38,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:38,407 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:38,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:38,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1770982754, now seen corresponding path program 2 times [2024-11-14 04:11:38,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:38,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428723321] [2024-11-14 04:11:38,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:38,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:11:38,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:38,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428723321] [2024-11-14 04:11:38,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428723321] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:38,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305952411] [2024-11-14 04:11:38,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:11:38,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:38,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:38,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:11:38,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:11:38,817 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:11:38,818 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:11:38,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:11:38,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:11:38,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:11:38,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305952411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:11:38,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1236648434] [2024-11-14 04:11:38,959 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:11:38,960 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:11:38,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:11:38,960 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:11:38,961 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:11:39,357 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 04:11:39,365 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:11:39,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1155#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 04:11:39,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:11:39,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:11:39,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2024-11-14 04:11:39,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417328603] [2024-11-14 04:11:39,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:11:39,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 04:11:39,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:39,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 04:11:39,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-11-14 04:11:39,595 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:11:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:39,953 INFO L93 Difference]: Finished difference Result 89 states and 128 transitions. [2024-11-14 04:11:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 04:11:39,954 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-14 04:11:39,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:39,956 INFO L225 Difference]: With dead ends: 89 [2024-11-14 04:11:39,956 INFO L226 Difference]: Without dead ends: 59 [2024-11-14 04:11:39,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2024-11-14 04:11:39,957 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:39,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 114 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:11:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-14 04:11:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2024-11-14 04:11:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 41 states have internal predecessors, (50), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:11:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2024-11-14 04:11:39,975 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 22 [2024-11-14 04:11:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:39,975 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2024-11-14 04:11:39,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:11:39,977 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2024-11-14 04:11:39,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 04:11:39,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:39,978 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:40,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:11:40,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 04:11:40,179 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:40,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:40,179 INFO L85 PathProgramCache]: Analyzing trace with hash -874190718, now seen corresponding path program 3 times [2024-11-14 04:11:40,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:40,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312507857] [2024-11-14 04:11:40,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:40,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:11:40,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:40,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312507857] [2024-11-14 04:11:40,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312507857] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:40,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259600003] [2024-11-14 04:11:40,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:11:40,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:40,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:40,371 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:11:40,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:11:40,487 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:11:40,487 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:11:40,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:11:40,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:40,521 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:11:40,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:11:40,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259600003] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:11:40,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [771985407] [2024-11-14 04:11:40,682 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:11:40,684 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:11:40,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:11:40,684 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:11:40,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:11:41,046 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 04:11:41,053 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:11:41,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1581#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 04:11:41,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:11:41,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:11:41,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2024-11-14 04:11:41,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253700607] [2024-11-14 04:11:41,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:11:41,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 04:11:41,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:41,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 04:11:41,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2024-11-14 04:11:41,310 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:11:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:41,450 INFO L93 Difference]: Finished difference Result 96 states and 130 transitions. [2024-11-14 04:11:41,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:11:41,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2024-11-14 04:11:41,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:41,456 INFO L225 Difference]: With dead ends: 96 [2024-11-14 04:11:41,456 INFO L226 Difference]: Without dead ends: 55 [2024-11-14 04:11:41,457 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2024-11-14 04:11:41,460 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:41,462 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:11:41,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-14 04:11:41,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-11-14 04:11:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:11:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2024-11-14 04:11:41,487 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 26 [2024-11-14 04:11:41,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:41,488 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2024-11-14 04:11:41,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:11:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2024-11-14 04:11:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 04:11:41,492 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:41,492 INFO L215 NwaCegarLoop]: trace histogram [12, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:41,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-14 04:11:41,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:41,693 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:41,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:41,694 INFO L85 PathProgramCache]: Analyzing trace with hash 494869102, now seen corresponding path program 4 times [2024-11-14 04:11:41,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:41,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352716099] [2024-11-14 04:11:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:41,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:11:42,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:42,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352716099] [2024-11-14 04:11:42,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352716099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:42,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609493995] [2024-11-14 04:11:42,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:11:42,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:42,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:42,345 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:11:42,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:11:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:42,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 04:11:42,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 04:11:42,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:11:43,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609493995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:11:43,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [317550443] [2024-11-14 04:11:43,074 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:11:43,075 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:11:43,077 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:11:43,077 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:11:43,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:11:43,403 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 04:11:43,411 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:11:43,696 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2081#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 04:11:43,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:11:43,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:11:43,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 29 [2024-11-14 04:11:43,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362338193] [2024-11-14 04:11:43,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:11:43,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 04:11:43,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:43,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 04:11:43,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=977, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 04:11:43,701 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:11:43,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:43,816 INFO L93 Difference]: Finished difference Result 110 states and 151 transitions. [2024-11-14 04:11:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 04:11:43,817 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2024-11-14 04:11:43,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:43,818 INFO L225 Difference]: With dead ends: 110 [2024-11-14 04:11:43,818 INFO L226 Difference]: Without dead ends: 69 [2024-11-14 04:11:43,820 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=429, Invalid=977, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 04:11:43,821 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:43,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:11:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-14 04:11:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-14 04:11:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 62 states have internal predecessors, (71), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:11:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2024-11-14 04:11:43,837 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 33 [2024-11-14 04:11:43,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:43,837 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2024-11-14 04:11:43,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:11:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2024-11-14 04:11:43,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 04:11:43,839 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:43,839 INFO L215 NwaCegarLoop]: trace histogram [26, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:43,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:11:44,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 04:11:44,040 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:44,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:44,041 INFO L85 PathProgramCache]: Analyzing trace with hash -645428242, now seen corresponding path program 5 times [2024-11-14 04:11:44,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:44,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337591058] [2024-11-14 04:11:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:44,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 2 proven. 351 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:11:45,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:45,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337591058] [2024-11-14 04:11:45,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337591058] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:45,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419388167] [2024-11-14 04:11:45,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:11:45,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:45,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:45,482 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:11:45,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:11:45,635 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:11:45,635 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:11:45,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:11:45,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2024-11-14 04:11:45,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2024-11-14 04:11:46,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419388167] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:11:46,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2024985164] [2024-11-14 04:11:46,041 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:11:46,041 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:11:46,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:11:46,042 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:11:46,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:11:46,332 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 04:11:46,339 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:11:46,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2733#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 04:11:46,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:11:46,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:11:46,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 8, 8] total 41 [2024-11-14 04:11:46,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494117016] [2024-11-14 04:11:46,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:11:46,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 04:11:46,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:46,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 04:11:46,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=1853, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 04:11:46,716 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:11:47,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:47,504 INFO L93 Difference]: Finished difference Result 131 states and 176 transitions. [2024-11-14 04:11:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-14 04:11:47,505 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2024-11-14 04:11:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:47,506 INFO L225 Difference]: With dead ends: 131 [2024-11-14 04:11:47,507 INFO L226 Difference]: Without dead ends: 90 [2024-11-14 04:11:47,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=719, Invalid=3313, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 04:11:47,511 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:47,512 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 174 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:11:47,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-14 04:11:47,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2024-11-14 04:11:47,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 72 states have internal predecessors, (81), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:11:47,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 93 transitions. [2024-11-14 04:11:47,542 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 93 transitions. Word has length 47 [2024-11-14 04:11:47,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:47,542 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 93 transitions. [2024-11-14 04:11:47,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:11:47,543 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 93 transitions. [2024-11-14 04:11:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 04:11:47,547 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:47,547 INFO L215 NwaCegarLoop]: trace histogram [27, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:47,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:11:47,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 04:11:47,749 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:47,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:47,750 INFO L85 PathProgramCache]: Analyzing trace with hash -921915390, now seen corresponding path program 6 times [2024-11-14 04:11:47,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:47,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549256333] [2024-11-14 04:11:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:47,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 2 proven. 378 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-14 04:11:49,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:49,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549256333] [2024-11-14 04:11:49,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549256333] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:49,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578639170] [2024-11-14 04:11:49,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:11:49,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:49,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:49,217 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:11:49,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:11:49,414 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:11:49,414 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:11:49,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 04:11:49,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-14 04:11:49,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:11:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 2 proven. 378 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-14 04:11:51,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578639170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:11:51,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1998898669] [2024-11-14 04:11:51,174 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:11:51,174 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:11:51,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:11:51,175 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:11:51,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:11:51,445 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 04:11:51,451 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:11:51,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3534#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 04:11:51,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:11:51,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:11:51,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 30] total 59 [2024-11-14 04:11:51,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857310163] [2024-11-14 04:11:51,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:11:51,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-14 04:11:51,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:11:51,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-14 04:11:51,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1734, Invalid=2822, Unknown=0, NotChecked=0, Total=4556 [2024-11-14 04:11:51,764 INFO L87 Difference]: Start difference. First operand 79 states and 93 transitions. Second operand has 59 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 59 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:11:51,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:11:51,957 INFO L93 Difference]: Finished difference Result 158 states and 214 transitions. [2024-11-14 04:11:51,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-14 04:11:51,959 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 59 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2024-11-14 04:11:51,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:11:51,960 INFO L225 Difference]: With dead ends: 158 [2024-11-14 04:11:51,960 INFO L226 Difference]: Without dead ends: 108 [2024-11-14 04:11:51,964 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1734, Invalid=2822, Unknown=0, NotChecked=0, Total=4556 [2024-11-14 04:11:51,965 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:11:51,966 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:11:51,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-14 04:11:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2024-11-14 04:11:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 101 states have internal predecessors, (110), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:11:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 122 transitions. [2024-11-14 04:11:51,996 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 122 transitions. Word has length 54 [2024-11-14 04:11:51,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:11:51,997 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 122 transitions. [2024-11-14 04:11:51,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 59 states have internal predecessors, (74), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:11:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 122 transitions. [2024-11-14 04:11:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-14 04:11:52,003 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:11:52,003 INFO L215 NwaCegarLoop]: trace histogram [56, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:11:52,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:11:52,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:52,205 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:11:52,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:11:52,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1126235282, now seen corresponding path program 7 times [2024-11-14 04:11:52,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:11:52,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434280215] [2024-11-14 04:11:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:11:52,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:11:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 2 proven. 1596 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-14 04:11:57,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:11:57,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434280215] [2024-11-14 04:11:57,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434280215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:11:57,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204013501] [2024-11-14 04:11:57,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:11:57,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:11:57,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:11:57,024 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:11:57,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:11:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:11:57,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-14 04:11:57,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:11:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-14 04:11:57,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:12:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1655 backedges. 2 proven. 1596 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-14 04:12:03,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204013501] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:12:03,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2014166452] [2024-11-14 04:12:03,177 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:12:03,177 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:12:03,177 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:12:03,177 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:12:03,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:12:03,387 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 04:12:03,393 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:12:03,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4652#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 04:12:03,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:12:03,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:12:03,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 59] total 117 [2024-11-14 04:12:03,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163073034] [2024-11-14 04:12:03,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:12:03,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2024-11-14 04:12:03,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:12:03,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2024-11-14 04:12:03,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6809, Invalid=8941, Unknown=0, NotChecked=0, Total=15750 [2024-11-14 04:12:03,940 INFO L87 Difference]: Start difference. First operand 108 states and 122 transitions. Second operand has 117 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 117 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:12:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:12:04,315 INFO L93 Difference]: Finished difference Result 216 states and 301 transitions. [2024-11-14 04:12:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-14 04:12:04,316 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 117 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 83 [2024-11-14 04:12:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:12:04,317 INFO L225 Difference]: With dead ends: 216 [2024-11-14 04:12:04,318 INFO L226 Difference]: Without dead ends: 166 [2024-11-14 04:12:04,322 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=6809, Invalid=8941, Unknown=0, NotChecked=0, Total=15750 [2024-11-14 04:12:04,323 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:12:04,324 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 160 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:12:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-14 04:12:04,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2024-11-14 04:12:04,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 157 states have (on average 1.070063694267516) internal successors, (168), 159 states have internal predecessors, (168), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:12:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 180 transitions. [2024-11-14 04:12:04,352 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 180 transitions. Word has length 83 [2024-11-14 04:12:04,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:12:04,353 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 180 transitions. [2024-11-14 04:12:04,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 117 states have internal predecessors, (132), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:12:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 180 transitions. [2024-11-14 04:12:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-14 04:12:04,356 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:12:04,356 INFO L215 NwaCegarLoop]: trace histogram [114, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:12:04,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:12:04,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:12:04,560 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:12:04,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:12:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash -567219218, now seen corresponding path program 8 times [2024-11-14 04:12:04,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:12:04,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272145987] [2024-11-14 04:12:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:12:04,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:12:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:12:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6614 backedges. 2 proven. 6555 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-14 04:12:17,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:12:17,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272145987] [2024-11-14 04:12:17,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272145987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:12:17,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131900371] [2024-11-14 04:12:17,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:12:17,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:12:17,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:12:17,627 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:12:17,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:12:18,036 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 04:12:18,036 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:12:18,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 04:12:18,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:12:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6614 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6559 trivial. 0 not checked. [2024-11-14 04:12:18,859 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:12:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6614 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 6557 trivial. 0 not checked. [2024-11-14 04:12:19,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131900371] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:12:19,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1909003935] [2024-11-14 04:12:19,849 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:12:19,849 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:12:19,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:12:19,850 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:12:19,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:12:20,058 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 04:12:20,068 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:12:20,965 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6374#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 04:12:20,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:12:20,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:12:20,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 14, 14] total 141 [2024-11-14 04:12:20,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247116339] [2024-11-14 04:12:20,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:12:20,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2024-11-14 04:12:20,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:12:20,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2024-11-14 04:12:20,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7089, Invalid=14963, Unknown=0, NotChecked=0, Total=22052 [2024-11-14 04:12:20,975 INFO L87 Difference]: Start difference. First operand 166 states and 180 transitions. Second operand has 141 states, 141 states have (on average 1.1205673758865249) internal successors, (158), 141 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:12:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:12:24,433 INFO L93 Difference]: Finished difference Result 246 states and 300 transitions. [2024-11-14 04:12:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2024-11-14 04:12:24,434 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.1205673758865249) internal successors, (158), 141 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 141 [2024-11-14 04:12:24,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:12:24,436 INFO L225 Difference]: With dead ends: 246 [2024-11-14 04:12:24,437 INFO L226 Difference]: Without dead ends: 196 [2024-11-14 04:12:24,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 389 SyntacticMatches, 2 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4885 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=8002, Invalid=24940, Unknown=0, NotChecked=0, Total=32942 [2024-11-14 04:12:24,442 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:12:24,442 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 212 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:12:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-14 04:12:24,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 185. [2024-11-14 04:12:24,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 176 states have (on average 1.0625) internal successors, (187), 178 states have internal predecessors, (187), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:12:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 199 transitions. [2024-11-14 04:12:24,474 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 199 transitions. Word has length 141 [2024-11-14 04:12:24,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:12:24,474 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 199 transitions. [2024-11-14 04:12:24,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.1205673758865249) internal successors, (158), 141 states have internal predecessors, (158), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:12:24,479 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 199 transitions. [2024-11-14 04:12:24,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-14 04:12:24,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:12:24,481 INFO L215 NwaCegarLoop]: trace histogram [115, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:12:24,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:12:24,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:12:24,682 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:12:24,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:12:24,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1061857282, now seen corresponding path program 9 times [2024-11-14 04:12:24,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:12:24,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320809982] [2024-11-14 04:12:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:12:24,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:12:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:12:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6927 backedges. 2 proven. 6670 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-11-14 04:12:35,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:12:35,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320809982] [2024-11-14 04:12:35,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320809982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:12:35,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99142047] [2024-11-14 04:12:35,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:12:35,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:12:35,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:12:35,850 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:12:35,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:12:36,337 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:12:36,338 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:12:36,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-14 04:12:36,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:12:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6927 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2024-11-14 04:12:36,610 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:12:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6927 backedges. 2 proven. 6670 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-11-14 04:12:53,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99142047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:12:53,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550987577] [2024-11-14 04:12:53,709 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:12:53,710 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:12:53,710 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:12:53,710 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:12:53,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:12:53,900 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 04:12:53,905 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:12:54,806 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8429#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 04:12:54,806 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:12:54,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:12:54,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 117, 118] total 235 [2024-11-14 04:12:54,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882285310] [2024-11-14 04:12:54,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:12:54,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 235 states [2024-11-14 04:12:54,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:12:54,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 235 interpolants. [2024-11-14 04:12:54,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27518, Invalid=31774, Unknown=0, NotChecked=0, Total=59292 [2024-11-14 04:12:54,823 INFO L87 Difference]: Start difference. First operand 185 states and 199 transitions. Second operand has 235 states, 235 states have (on average 1.0638297872340425) internal successors, (250), 235 states have internal predecessors, (250), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:12:55,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:12:55,838 INFO L93 Difference]: Finished difference Result 370 states and 514 transitions. [2024-11-14 04:12:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2024-11-14 04:12:55,838 INFO L78 Accepts]: Start accepts. Automaton has has 235 states, 235 states have (on average 1.0638297872340425) internal successors, (250), 235 states have internal predecessors, (250), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 154 [2024-11-14 04:12:55,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:12:55,842 INFO L225 Difference]: With dead ends: 370 [2024-11-14 04:12:55,842 INFO L226 Difference]: Without dead ends: 302 [2024-11-14 04:12:55,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 334 SyntacticMatches, 2 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4299 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=27518, Invalid=31774, Unknown=0, NotChecked=0, Total=59292 [2024-11-14 04:12:55,850 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:12:55,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:12:55,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-11-14 04:12:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2024-11-14 04:12:55,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 293 states have (on average 1.0375426621160408) internal successors, (304), 295 states have internal predecessors, (304), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:12:55,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 316 transitions. [2024-11-14 04:12:55,925 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 316 transitions. Word has length 154 [2024-11-14 04:12:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:12:55,925 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 316 transitions. [2024-11-14 04:12:55,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 235 states, 235 states have (on average 1.0638297872340425) internal successors, (250), 235 states have internal predecessors, (250), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:12:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 316 transitions. [2024-11-14 04:12:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2024-11-14 04:12:55,931 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:12:55,931 INFO L215 NwaCegarLoop]: trace histogram [232, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:12:55,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:12:56,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:12:56,132 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:12:56,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:12:56,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1849687186, now seen corresponding path program 10 times [2024-11-14 04:12:56,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:12:56,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488998514] [2024-11-14 04:12:56,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:12:56,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:12:56,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 27285 backedges. 2 proven. 27028 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-11-14 04:13:39,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:13:39,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488998514] [2024-11-14 04:13:39,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488998514] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:13:39,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075003259] [2024-11-14 04:13:39,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:13:39,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:13:39,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:13:39,147 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:13:39,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:13:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:40,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 2257 conjuncts, 234 conjuncts are in the unsatisfiable core [2024-11-14 04:13:40,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:13:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 27285 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2024-11-14 04:13:40,683 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:15:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 27285 backedges. 2 proven. 27028 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-11-14 04:15:05,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075003259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:15:05,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1139715341] [2024-11-14 04:15:05,340 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:15:05,340 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:15:05,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:15:05,340 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:15:05,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:15:05,536 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 04:15:05,541 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:15:07,022 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11839#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 04:15:07,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:15:07,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:15:07,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [235, 234, 235] total 469 [2024-11-14 04:15:07,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016299528] [2024-11-14 04:15:07,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:15:07,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 469 states [2024-11-14 04:15:07,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:15:07,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 469 interpolants. [2024-11-14 04:15:07,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109769, Invalid=118237, Unknown=0, NotChecked=0, Total=228006 [2024-11-14 04:15:07,057 INFO L87 Difference]: Start difference. First operand 302 states and 316 transitions. Second operand has 469 states, 469 states have (on average 1.0319829424307037) internal successors, (484), 469 states have internal predecessors, (484), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:15:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:15:10,978 INFO L93 Difference]: Finished difference Result 604 states and 865 transitions. [2024-11-14 04:15:10,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 468 states. [2024-11-14 04:15:10,979 INFO L78 Accepts]: Start accepts. Automaton has has 469 states, 469 states have (on average 1.0319829424307037) internal successors, (484), 469 states have internal predecessors, (484), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 271 [2024-11-14 04:15:10,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:15:10,984 INFO L225 Difference]: With dead ends: 604 [2024-11-14 04:15:10,984 INFO L226 Difference]: Without dead ends: 536 [2024-11-14 04:15:10,999 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1046 GetRequests, 568 SyntacticMatches, 2 SemanticMatches, 476 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8628 ImplicationChecksByTransitivity, 114.6s TimeCoverageRelationStatistics Valid=109769, Invalid=118237, Unknown=0, NotChecked=0, Total=228006 [2024-11-14 04:15:11,000 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:15:11,001 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 140 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:15:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2024-11-14 04:15:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2024-11-14 04:15:11,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 527 states have (on average 1.0208728652751422) internal successors, (538), 529 states have internal predecessors, (538), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:15:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 550 transitions. [2024-11-14 04:15:11,067 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 550 transitions. Word has length 271 [2024-11-14 04:15:11,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:15:11,068 INFO L471 AbstractCegarLoop]: Abstraction has 536 states and 550 transitions. [2024-11-14 04:15:11,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 469 states, 469 states have (on average 1.0319829424307037) internal successors, (484), 469 states have internal predecessors, (484), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:15:11,069 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 550 transitions. [2024-11-14 04:15:11,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2024-11-14 04:15:11,080 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:15:11,081 INFO L215 NwaCegarLoop]: trace histogram [466, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:15:11,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 04:15:11,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 04:15:11,282 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:15:11,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:15:11,282 INFO L85 PathProgramCache]: Analyzing trace with hash -148994066, now seen corresponding path program 11 times [2024-11-14 04:15:11,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:15:11,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977339394] [2024-11-14 04:15:11,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:15:11,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:15:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:17:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 109068 backedges. 2 proven. 108811 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-11-14 04:17:53,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:17:53,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977339394] [2024-11-14 04:17:53,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977339394] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:17:53,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292636353] [2024-11-14 04:17:53,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:17:53,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:17:53,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:17:53,047 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:17:53,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:17:56,093 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-14 04:17:56,094 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:17:56,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 04:17:56,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:18:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 109068 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 108815 trivial. 0 not checked. [2024-11-14 04:18:01,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 109068 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 108813 trivial. 0 not checked. [2024-11-14 04:18:08,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292636353] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:08,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [743751024] [2024-11-14 04:18:08,265 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2024-11-14 04:18:08,265 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:08,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:08,265 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:08,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:08,403 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 04:18:08,408 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:11,337 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17637#(= |__VERIFIER_assert_#in~cond| 0)' at error location [2024-11-14 04:18:11,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:11,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:11,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [469, 26, 26] total 517 [2024-11-14 04:18:11,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91873381] [2024-11-14 04:18:11,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:11,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 517 states [2024-11-14 04:18:11,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:11,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 517 interpolants. [2024-11-14 04:18:11,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110901, Invalid=164199, Unknown=0, NotChecked=0, Total=275100 [2024-11-14 04:18:11,372 INFO L87 Difference]: Start difference. First operand 536 states and 550 transitions. Second operand has 517 states, 517 states have (on average 1.0328820116054158) internal successors, (534), 517 states have internal predecessors, (534), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:18:34,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:34,277 INFO L93 Difference]: Finished difference Result 652 states and 724 transitions. [2024-11-14 04:18:34,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 540 states. [2024-11-14 04:18:34,278 INFO L78 Accepts]: Start accepts. Automaton has has 517 states, 517 states have (on average 1.0328820116054158) internal successors, (534), 517 states have internal predecessors, (534), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 505 [2024-11-14 04:18:34,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:34,285 INFO L225 Difference]: With dead ends: 652 [2024-11-14 04:18:34,285 INFO L226 Difference]: Without dead ends: 584 [2024-11-14 04:18:34,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2051 GetRequests, 1457 SyntacticMatches, 2 SemanticMatches, 592 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30647 ImplicationChecksByTransitivity, 136.4s TimeCoverageRelationStatistics Valid=114604, Invalid=237638, Unknown=0, NotChecked=0, Total=352242 [2024-11-14 04:18:34,311 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 137 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:34,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 198 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 04:18:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2024-11-14 04:18:34,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 573. [2024-11-14 04:18:34,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 564 states have (on average 1.0195035460992907) internal successors, (575), 566 states have internal predecessors, (575), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-14 04:18:34,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 587 transitions. [2024-11-14 04:18:34,364 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 587 transitions. Word has length 505 [2024-11-14 04:18:34,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:34,365 INFO L471 AbstractCegarLoop]: Abstraction has 573 states and 587 transitions. [2024-11-14 04:18:34,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 517 states, 517 states have (on average 1.0328820116054158) internal successors, (534), 517 states have internal predecessors, (534), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:18:34,366 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 587 transitions. [2024-11-14 04:18:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2024-11-14 04:18:34,377 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:34,378 INFO L215 NwaCegarLoop]: trace histogram [467, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:34,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 04:18:34,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 04:18:34,578 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:34,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:34,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1105640450, now seen corresponding path program 12 times [2024-11-14 04:18:34,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:34,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861285631] [2024-11-14 04:18:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:34,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:21:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 110363 backedges. 2 proven. 109278 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2024-11-14 04:21:10,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:21:10,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861285631] [2024-11-14 04:21:10,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861285631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:21:10,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826217238] [2024-11-14 04:21:10,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:21:10,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:10,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:21:10,739 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:21:10,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10353e98-a8a7-4990-be23-dd6cfdc6da18/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 04:21:12,382 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:21:12,382 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:21:12,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 4468 conjuncts, 469 conjuncts are in the unsatisfiable core [2024-11-14 04:21:12,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 110363 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2024-11-14 04:21:13,473 INFO L311 TraceCheckSpWp]: Computing backward predicates...