./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/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_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/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_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/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 cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:12:19,116 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:12:19,248 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:12:19,258 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:12:19,262 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:12:19,301 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:12:19,302 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:12:19,302 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:12:19,303 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:12:19,303 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:12:19,304 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:12:19,305 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:12:19,305 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:12:19,305 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:12:19,305 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:12:19,306 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:12:19,306 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:12:19,306 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:12:19,306 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:12:19,307 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:12:19,307 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:12:19,307 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:12:19,308 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:12:19,308 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:12:19,308 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:12:19,308 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:12:19,309 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:12:19,309 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:12:19,309 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:12:19,309 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:12:19,309 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:12:19,310 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:12:19,310 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:12:19,310 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:12:19,310 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:12:19,310 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:12:19,310 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:12:19,310 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:12:19,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:12:19,311 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:12:19,311 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:12:19,311 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:12:19,311 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:12:19,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:12:19,311 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:12:19,311 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:12:19,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:12:19,311 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_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/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 -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2024-11-14 03:12:19,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:12:19,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:12:19,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:12:19,779 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:12:19,782 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:12:19,784 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i Unable to find full path for "g++" [2024-11-14 03:12:21,929 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:12:22,257 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:12:22,258 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2024-11-14 03:12:22,276 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/data/d8e1cf765/ceee26a7959f4183a3b81b4c1a14a3c8/FLAGf6c0d4d5c [2024-11-14 03:12:22,325 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/data/d8e1cf765/ceee26a7959f4183a3b81b4c1a14a3c8 [2024-11-14 03:12:22,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:12:22,338 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:12:22,340 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:12:22,343 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:12:22,353 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:12:22,355 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:12:22" (1/1) ... [2024-11-14 03:12:22,357 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22253b57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:22, skipping insertion in model container [2024-11-14 03:12:22,357 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:12:22" (1/1) ... [2024-11-14 03:12:22,377 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:12:22,602 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_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2024-11-14 03:12:22,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:12:22,645 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:12:22,655 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_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i[823,836] [2024-11-14 03:12:22,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:12:22,688 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:12:22,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:22 WrapperNode [2024-11-14 03:12:22,689 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:12:22,690 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:12:22,690 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:12:22,691 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:12:22,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:22" (1/1) ... [2024-11-14 03:12:22,707 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:22" (1/1) ... [2024-11-14 03:12:22,729 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 108 [2024-11-14 03:12:22,730 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:12:22,730 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:12:22,731 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:12:22,731 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:12:22,740 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:22" (1/1) ... [2024-11-14 03:12:22,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:22" (1/1) ... [2024-11-14 03:12:22,742 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:22" (1/1) ... [2024-11-14 03:12:22,743 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:22" (1/1) ... [2024-11-14 03:12:22,749 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:22" (1/1) ... [2024-11-14 03:12:22,754 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:22" (1/1) ... [2024-11-14 03:12:22,756 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:22" (1/1) ... [2024-11-14 03:12:22,757 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:22" (1/1) ... [2024-11-14 03:12:22,759 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:12:22,760 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:12:22,760 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:12:22,760 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:12:22,762 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:22" (1/1) ... [2024-11-14 03:12:22,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:12:22,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:22,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:12:22,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:12:22,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:12:22,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:12:22,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:12:22,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 03:12:22,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:12:22,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:12:22,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 03:12:22,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 03:12:22,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 03:12:22,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:12:22,962 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:12:22,965 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:12:23,217 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-14 03:12:23,217 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:12:23,314 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:12:23,315 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-14 03:12:23,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:12:23 BoogieIcfgContainer [2024-11-14 03:12:23,315 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:12:23,319 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:12:23,319 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:12:23,325 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:12:23,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:12:22" (1/3) ... [2024-11-14 03:12:23,326 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c00caf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:12:23, skipping insertion in model container [2024-11-14 03:12:23,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:12:22" (2/3) ... [2024-11-14 03:12:23,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c00caf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:12:23, skipping insertion in model container [2024-11-14 03:12:23,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:12:23" (3/3) ... [2024-11-14 03:12:23,330 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2024-11-14 03:12:23,349 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:12:23,351 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sorting_selectionsort_2_ground.i that has 2 procedures, 22 locations, 1 initial locations, 8 loop locations, and 1 error locations. [2024-11-14 03:12:23,414 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:12:23,433 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;@5fb5c888, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:12:23,433 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:12:23,438 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 03:12:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 03:12:23,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:23,450 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:23,450 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:12:23,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:23,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1765365258, now seen corresponding path program 1 times [2024-11-14 03:12:23,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:23,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327039743] [2024-11-14 03:12:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:23,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:23,708 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 03:12:23,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:23,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327039743] [2024-11-14 03:12:23,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327039743] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:23,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:12:23,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:12:23,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811790098] [2024-11-14 03:12:23,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:23,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:12:23,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:23,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:12:23,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:12:23,746 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 03:12:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:23,910 INFO L93 Difference]: Finished difference Result 52 states and 84 transitions. [2024-11-14 03:12:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:12:23,913 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 03:12:23,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:23,922 INFO L225 Difference]: With dead ends: 52 [2024-11-14 03:12:23,922 INFO L226 Difference]: Without dead ends: 31 [2024-11-14 03:12:23,927 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 03:12:23,931 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:23,932 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 32 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:23,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-14 03:12:23,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2024-11-14 03:12:23,968 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 03:12:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2024-11-14 03:12:23,975 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 9 [2024-11-14 03:12:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:23,976 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2024-11-14 03:12:23,976 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 03:12:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2024-11-14 03:12:23,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 03:12:23,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:23,978 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:23,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:12:23,979 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:12:23,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:23,980 INFO L85 PathProgramCache]: Analyzing trace with hash 320956148, now seen corresponding path program 1 times [2024-11-14 03:12:23,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:23,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622033084] [2024-11-14 03:12:23,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:23,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:24,135 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 03:12:24,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:24,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622033084] [2024-11-14 03:12:24,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622033084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:24,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864110571] [2024-11-14 03:12:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:24,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:24,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:24,139 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:24,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:12:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:24,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:12:24,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:24,308 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 03:12:24,308 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:24,354 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 03:12:24,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864110571] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:24,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1597787379] [2024-11-14 03:12:24,387 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:12:24,387 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:24,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:24,397 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:24,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:24,909 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:25,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1597787379] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:12:25,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:25,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2024-11-14 03:12:25,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662380324] [2024-11-14 03:12:25,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:12:25,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:12:25,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:25,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:12:25,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:12:25,015 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 03:12:25,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:25,168 INFO L93 Difference]: Finished difference Result 51 states and 75 transitions. [2024-11-14 03:12:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:12:25,169 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 03:12:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:25,171 INFO L225 Difference]: With dead ends: 51 [2024-11-14 03:12:25,172 INFO L226 Difference]: Without dead ends: 32 [2024-11-14 03:12:25,173 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:12:25,174 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:25,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 29 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:25,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-14 03:12:25,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2024-11-14 03:12:25,188 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 03:12:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2024-11-14 03:12:25,191 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 11 [2024-11-14 03:12:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:25,192 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2024-11-14 03:12:25,192 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 03:12:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2024-11-14 03:12:25,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 03:12:25,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:25,194 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:25,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:12:25,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:25,395 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:12:25,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:25,396 INFO L85 PathProgramCache]: Analyzing trace with hash 948479220, now seen corresponding path program 1 times [2024-11-14 03:12:25,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:25,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760832913] [2024-11-14 03:12:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:25,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:25,561 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 03:12:25,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:25,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760832913] [2024-11-14 03:12:25,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760832913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:25,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335205052] [2024-11-14 03:12:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:25,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:25,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:25,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:25,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:12:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:25,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:12:25,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:25,672 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 03:12:25,673 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:25,704 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 03:12:25,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335205052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:25,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1361893561] [2024-11-14 03:12:25,707 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:12:25,708 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:25,708 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:25,708 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:25,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:26,071 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2024-11-14 03:12:26,096 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:26,370 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '421#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_1|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_1| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| 4) (- 4)))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1| 1))))' at error location [2024-11-14 03:12:26,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:26,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:26,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-14 03:12:26,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194018922] [2024-11-14 03:12:26,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:26,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:12:26,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:26,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:12:26,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:12:26,373 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:26,577 INFO L93 Difference]: Finished difference Result 75 states and 116 transitions. [2024-11-14 03:12:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:12:26,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-14 03:12:26,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:26,579 INFO L225 Difference]: With dead ends: 75 [2024-11-14 03:12:26,579 INFO L226 Difference]: Without dead ends: 54 [2024-11-14 03:12:26,580 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:12:26,581 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:26,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 62 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:12:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-14 03:12:26,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-14 03:12:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 03:12:26,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 81 transitions. [2024-11-14 03:12:26,612 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 81 transitions. Word has length 12 [2024-11-14 03:12:26,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:26,612 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 81 transitions. [2024-11-14 03:12:26,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:26,613 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 81 transitions. [2024-11-14 03:12:26,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 03:12:26,613 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:26,613 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:26,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:12:26,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:26,814 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:12:26,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:26,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1960329504, now seen corresponding path program 2 times [2024-11-14 03:12:26,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:26,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651947002] [2024-11-14 03:12:26,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:26,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:12:27,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:27,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651947002] [2024-11-14 03:12:27,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651947002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:27,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629459101] [2024-11-14 03:12:27,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:12:27,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:27,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:27,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:27,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:12:27,138 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 03:12:27,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:12:27,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 03:12:27,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:12:27,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:12:27,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629459101] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:27,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1993518275] [2024-11-14 03:12:27,233 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:12:27,234 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:27,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:27,235 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:27,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:27,518 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2024-11-14 03:12:27,540 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:27,849 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '746#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2| Int)) (and (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_2| 1) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_2| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_2| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_2| 4) (- 4)))))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:12:27,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:27,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:27,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-14 03:12:27,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745241813] [2024-11-14 03:12:27,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:27,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 03:12:27,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:27,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 03:12:27,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-14 03:12:27,852 INFO L87 Difference]: Start difference. First operand 54 states and 81 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:28,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:28,135 INFO L93 Difference]: Finished difference Result 106 states and 165 transitions. [2024-11-14 03:12:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 03:12:28,136 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-14 03:12:28,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:28,137 INFO L225 Difference]: With dead ends: 106 [2024-11-14 03:12:28,138 INFO L226 Difference]: Without dead ends: 61 [2024-11-14 03:12:28,138 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2024-11-14 03:12:28,139 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:28,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 82 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:12:28,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-14 03:12:28,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-14 03:12:28,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 03:12:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 88 transitions. [2024-11-14 03:12:28,158 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 88 transitions. Word has length 15 [2024-11-14 03:12:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:28,158 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 88 transitions. [2024-11-14 03:12:28,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:12:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 88 transitions. [2024-11-14 03:12:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 03:12:28,159 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:28,160 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:28,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 03:12:28,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:28,364 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:12:28,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:28,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1832225400, now seen corresponding path program 3 times [2024-11-14 03:12:28,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:28,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888709619] [2024-11-14 03:12:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:28,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:12:28,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:28,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888709619] [2024-11-14 03:12:28,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888709619] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:28,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303562162] [2024-11-14 03:12:28,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:12:28,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:28,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:28,560 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:28,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:12:28,659 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:12:28,659 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:12:28,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:12:28,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:12:28,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:12:28,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303562162] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:28,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [354664338] [2024-11-14 03:12:28,797 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:12:28,798 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:28,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:28,798 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:28,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:29,003 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2024-11-14 03:12:29,018 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:29,648 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1174#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_3| 4) 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_3|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_3| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_3| 4)))) (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_3| 0))))' at error location [2024-11-14 03:12:29,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:29,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:29,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-14 03:12:29,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896719855] [2024-11-14 03:12:29,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:29,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:12:29,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:29,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:12:29,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2024-11-14 03:12:29,651 INFO L87 Difference]: Start difference. First operand 61 states and 88 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 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 03:12:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:30,129 INFO L93 Difference]: Finished difference Result 182 states and 283 transitions. [2024-11-14 03:12:30,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:12:30,132 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 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 18 [2024-11-14 03:12:30,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:30,134 INFO L225 Difference]: With dead ends: 182 [2024-11-14 03:12:30,134 INFO L226 Difference]: Without dead ends: 127 [2024-11-14 03:12:30,135 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2024-11-14 03:12:30,139 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 202 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:30,140 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 78 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 03:12:30,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-14 03:12:30,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2024-11-14 03:12:30,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 104 states have (on average 1.4230769230769231) internal successors, (148), 104 states have internal predecessors, (148), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-14 03:12:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 190 transitions. [2024-11-14 03:12:30,178 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 190 transitions. Word has length 18 [2024-11-14 03:12:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:30,179 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 190 transitions. [2024-11-14 03:12:30,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 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 03:12:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 190 transitions. [2024-11-14 03:12:30,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 03:12:30,180 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:30,180 INFO L215 NwaCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:30,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 03:12:30,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:30,385 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:12:30,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:30,385 INFO L85 PathProgramCache]: Analyzing trace with hash 36879880, now seen corresponding path program 4 times [2024-11-14 03:12:30,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:30,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116985311] [2024-11-14 03:12:30,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:30,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:12:30,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:30,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116985311] [2024-11-14 03:12:30,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116985311] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:30,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595871016] [2024-11-14 03:12:30,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:12:30,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:30,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:30,898 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:30,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:12:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:31,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 03:12:31,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:12:31,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:12:31,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595871016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:31,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1291055752] [2024-11-14 03:12:31,435 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:12:31,436 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:31,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:31,438 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:31,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:31,628 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2024-11-14 03:12:31,648 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:31,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1898#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4| Int)) (and (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_4| 0) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| 4 (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_4| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_4| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_4| 4)))))))' at error location [2024-11-14 03:12:31,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:31,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:31,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-11-14 03:12:31,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398467244] [2024-11-14 03:12:31,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:31,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 03:12:31,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:31,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 03:12:31,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=669, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 03:12:31,965 INFO L87 Difference]: Start difference. First operand 127 states and 190 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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 03:12:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:32,868 INFO L93 Difference]: Finished difference Result 374 states and 595 transitions. [2024-11-14 03:12:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 03:12:32,869 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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 24 [2024-11-14 03:12:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:32,873 INFO L225 Difference]: With dead ends: 374 [2024-11-14 03:12:32,873 INFO L226 Difference]: Without dead ends: 259 [2024-11-14 03:12:32,875 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=387, Invalid=669, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 03:12:32,876 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 400 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:32,876 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 163 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:12:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-14 03:12:32,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2024-11-14 03:12:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 212 states have (on average 1.4339622641509433) internal successors, (304), 212 states have internal predecessors, (304), 45 states have call successors, (45), 1 states have call predecessors, (45), 1 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-11-14 03:12:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 394 transitions. [2024-11-14 03:12:32,957 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 394 transitions. Word has length 24 [2024-11-14 03:12:32,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:32,958 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 394 transitions. [2024-11-14 03:12:32,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 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 03:12:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 394 transitions. [2024-11-14 03:12:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 03:12:32,961 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:32,961 INFO L215 NwaCegarLoop]: trace histogram [22, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:32,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 03:12:33,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:33,163 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:12:33,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:33,163 INFO L85 PathProgramCache]: Analyzing trace with hash 639774472, now seen corresponding path program 5 times [2024-11-14 03:12:33,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:33,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841240843] [2024-11-14 03:12:33,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:33,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:12:34,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:34,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841240843] [2024-11-14 03:12:34,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841240843] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:34,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18377150] [2024-11-14 03:12:34,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:12:34,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:34,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:34,234 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:34,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:12:34,374 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:12:34,374 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:12:34,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 03:12:34,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 03:12:34,528 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 03:12:34,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18377150] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:34,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1782073912] [2024-11-14 03:12:34,749 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:12:34,750 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:34,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:34,750 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:34,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:34,952 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2024-11-14 03:12:34,967 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:35,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3294#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_5| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_5| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_5|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_5| (- 4) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_5| 4)))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_5| 1))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:12:35,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:35,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:35,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8, 8] total 37 [2024-11-14 03:12:35,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443066535] [2024-11-14 03:12:35,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:35,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-14 03:12:35,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:35,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-14 03:12:35,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=1471, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 03:12:35,396 INFO L87 Difference]: Start difference. First operand 259 states and 394 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 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 03:12:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:42,794 INFO L93 Difference]: Finished difference Result 632 states and 1030 transitions. [2024-11-14 03:12:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2024-11-14 03:12:42,794 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 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 36 [2024-11-14 03:12:42,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:42,803 INFO L225 Difference]: With dead ends: 632 [2024-11-14 03:12:42,803 INFO L226 Difference]: Without dead ends: 397 [2024-11-14 03:12:42,826 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10511 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=9269, Invalid=22951, Unknown=0, NotChecked=0, Total=32220 [2024-11-14 03:12:42,830 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1133 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:42,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1181 Valid, 166 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 03:12:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-11-14 03:12:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 388. [2024-11-14 03:12:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 337 states have (on average 1.2967359050445104) internal successors, (437), 337 states have internal predecessors, (437), 49 states have call successors, (49), 1 states have call predecessors, (49), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2024-11-14 03:12:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 535 transitions. [2024-11-14 03:12:42,933 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 535 transitions. Word has length 36 [2024-11-14 03:12:42,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:42,936 INFO L471 AbstractCegarLoop]: Abstraction has 388 states and 535 transitions. [2024-11-14 03:12:42,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 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 03:12:42,937 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 535 transitions. [2024-11-14 03:12:42,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 03:12:42,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:42,938 INFO L215 NwaCegarLoop]: trace histogram [24, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:42,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:12:43,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:43,139 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:12:43,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:43,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1709023864, now seen corresponding path program 6 times [2024-11-14 03:12:43,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:43,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788247335] [2024-11-14 03:12:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:43,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 03:12:44,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:44,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788247335] [2024-11-14 03:12:44,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788247335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:44,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962553646] [2024-11-14 03:12:44,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:12:44,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:44,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:44,250 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:44,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:12:44,430 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:12:44,430 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:12:44,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 03:12:44,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 03:12:44,505 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 03:12:45,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962553646] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:45,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [244512932] [2024-11-14 03:12:45,592 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:12:45,592 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:45,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:45,593 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:45,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:45,770 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 26 for LOIs [2024-11-14 03:12:45,782 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:46,278 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5764#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 4))) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_6|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_6| (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 4) (- 4)))) (<= |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_6| 1))))' at error location [2024-11-14 03:12:46,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:46,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:46,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2024-11-14 03:12:46,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808413493] [2024-11-14 03:12:46,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:46,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 03:12:46,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:46,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 03:12:46,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1549, Invalid=2111, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 03:12:46,282 INFO L87 Difference]: Start difference. First operand 388 states and 535 transitions. Second operand has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 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 03:12:48,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:12:48,505 INFO L93 Difference]: Finished difference Result 1036 states and 1537 transitions. [2024-11-14 03:12:48,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-14 03:12:48,506 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 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 44 [2024-11-14 03:12:48,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:12:48,513 INFO L225 Difference]: With dead ends: 1036 [2024-11-14 03:12:48,513 INFO L226 Difference]: Without dead ends: 674 [2024-11-14 03:12:48,515 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1549, Invalid=2111, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 03:12:48,515 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 1436 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1536 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:12:48,516 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1536 Valid, 249 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 03:12:48,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2024-11-14 03:12:48,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 674. [2024-11-14 03:12:48,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 571 states have (on average 1.3572679509632224) internal successors, (775), 571 states have internal predecessors, (775), 101 states have call successors, (101), 1 states have call predecessors, (101), 1 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2024-11-14 03:12:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 977 transitions. [2024-11-14 03:12:48,617 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 977 transitions. Word has length 44 [2024-11-14 03:12:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:12:48,617 INFO L471 AbstractCegarLoop]: Abstraction has 674 states and 977 transitions. [2024-11-14 03:12:48,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.169811320754717) internal successors, (62), 52 states have internal predecessors, (62), 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 03:12:48,618 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 977 transitions. [2024-11-14 03:12:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-14 03:12:48,619 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:12:48,619 INFO L215 NwaCegarLoop]: trace histogram [50, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:12:48,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:12:48,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:48,820 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:12:48,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:12:48,820 INFO L85 PathProgramCache]: Analyzing trace with hash -524342008, now seen corresponding path program 7 times [2024-11-14 03:12:48,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:12:48,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024245151] [2024-11-14 03:12:48,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:12:48,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:12:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 03:12:52,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:12:52,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024245151] [2024-11-14 03:12:52,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024245151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:12:52,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403661170] [2024-11-14 03:12:52,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:12:52,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:12:52,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:12:52,072 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:12:52,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:12:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:12:52,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-14 03:12:52,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:12:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 03:12:52,495 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:12:56,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 03:12:56,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403661170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:12:56,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1424553845] [2024-11-14 03:12:56,706 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:12:56,706 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:12:56,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:12:56,707 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:12:56,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:12:56,870 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2024-11-14 03:12:56,878 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:12:57,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9446#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7| Int)) (and (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| 4) 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_7|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_7| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| 4)))) (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_7| 0))))' at error location [2024-11-14 03:12:57,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:12:57,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:12:57,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 104 [2024-11-14 03:12:57,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021249806] [2024-11-14 03:12:57,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:12:57,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-11-14 03:12:57,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:12:57,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-11-14 03:12:57,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5787, Invalid=6869, Unknown=0, NotChecked=0, Total=12656 [2024-11-14 03:12:57,295 INFO L87 Difference]: Start difference. First operand 674 states and 977 transitions. Second operand has 105 states, 105 states have (on average 1.0857142857142856) internal successors, (114), 104 states have internal predecessors, (114), 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 03:13:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:13:06,445 INFO L93 Difference]: Finished difference Result 1868 states and 2889 transitions. [2024-11-14 03:13:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-11-14 03:13:06,446 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0857142857142856) internal successors, (114), 104 states have internal predecessors, (114), 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 70 [2024-11-14 03:13:06,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:13:06,458 INFO L225 Difference]: With dead ends: 1868 [2024-11-14 03:13:06,458 INFO L226 Difference]: Without dead ends: 1246 [2024-11-14 03:13:06,463 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5787, Invalid=6869, Unknown=0, NotChecked=0, Total=12656 [2024-11-14 03:13:06,464 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 3333 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3537 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:13:06,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3537 Valid, 424 Invalid, 1931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-14 03:13:06,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2024-11-14 03:13:06,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1246. [2024-11-14 03:13:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1039 states have (on average 1.3965351299326276) internal successors, (1451), 1039 states have internal predecessors, (1451), 205 states have call successors, (205), 1 states have call predecessors, (205), 1 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2024-11-14 03:13:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1861 transitions. [2024-11-14 03:13:06,652 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1861 transitions. Word has length 70 [2024-11-14 03:13:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:13:06,653 INFO L471 AbstractCegarLoop]: Abstraction has 1246 states and 1861 transitions. [2024-11-14 03:13:06,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0857142857142856) internal successors, (114), 104 states have internal predecessors, (114), 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 03:13:06,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1861 transitions. [2024-11-14 03:13:06,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-14 03:13:06,655 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:13:06,655 INFO L215 NwaCegarLoop]: trace histogram [102, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:13:06,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:13:06,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 03:13:06,856 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:13:06,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:13:06,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1796494328, now seen corresponding path program 8 times [2024-11-14 03:13:06,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:13:06,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354991693] [2024-11-14 03:13:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:13:06,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:13:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:13:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5308 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 03:13:16,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:13:16,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354991693] [2024-11-14 03:13:16,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354991693] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:13:16,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655267746] [2024-11-14 03:13:16,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:13:16,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:13:16,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:13:16,818 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:13:16,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:13:17,133 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 03:13:17,133 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:13:17,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 03:13:17,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:13:17,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5308 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2024-11-14 03:13:17,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:13:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5308 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5253 trivial. 0 not checked. [2024-11-14 03:13:18,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655267746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:13:18,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895780732] [2024-11-14 03:13:18,764 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:13:18,764 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:13:18,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:13:18,765 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:13:18,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:13:18,907 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2024-11-14 03:13:18,922 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:13:19,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16012#(and (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_8| Int)) (and (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_8| 0) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_8|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_8| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_8| 4) 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_8|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_8| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_8| 4)))))))' at error location [2024-11-14 03:13:19,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:13:19,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:13:19,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 14, 14] total 129 [2024-11-14 03:13:19,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294755789] [2024-11-14 03:13:19,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:13:19,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-11-14 03:13:19,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:13:19,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-11-14 03:13:19,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6279, Invalid=12353, Unknown=0, NotChecked=0, Total=18632 [2024-11-14 03:13:19,722 INFO L87 Difference]: Start difference. First operand 1246 states and 1861 transitions. Second operand has 129 states, 129 states have (on average 1.0852713178294573) internal successors, (140), 129 states have internal predecessors, (140), 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 03:19:01,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:19:01,866 INFO L93 Difference]: Finished difference Result 3414 states and 5660 transitions. [2024-11-14 03:19:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1317 states. [2024-11-14 03:19:01,867 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.0852713178294573) internal successors, (140), 129 states have internal predecessors, (140), 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 122 [2024-11-14 03:19:01,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:19:01,881 INFO L225 Difference]: With dead ends: 3414 [2024-11-14 03:19:01,881 INFO L226 Difference]: Without dead ends: 2272 [2024-11-14 03:19:02,007 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1678 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746036 ImplicationChecksByTransitivity, 285.3s TimeCoverageRelationStatistics Valid=517251, Invalid=1295811, Unknown=0, NotChecked=0, Total=1813062 [2024-11-14 03:19:02,008 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 8184 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1499 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8392 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 1499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:19:02,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8392 Valid, 488 Invalid, 2063 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [564 Valid, 1499 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-14 03:19:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2024-11-14 03:19:02,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 2263. [2024-11-14 03:19:02,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2052 states have (on average 1.2046783625730995) internal successors, (2472), 2052 states have internal predecessors, (2472), 209 states have call successors, (209), 1 states have call predecessors, (209), 1 states have return successors, (209), 209 states have call predecessors, (209), 209 states have call successors, (209) [2024-11-14 03:19:02,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 2890 transitions. [2024-11-14 03:19:02,252 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 2890 transitions. Word has length 122 [2024-11-14 03:19:02,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:19:02,252 INFO L471 AbstractCegarLoop]: Abstraction has 2263 states and 2890 transitions. [2024-11-14 03:19:02,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.0852713178294573) internal successors, (140), 129 states have internal predecessors, (140), 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 03:19:02,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 2890 transitions. [2024-11-14 03:19:02,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-14 03:19:02,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:19:02,254 INFO L215 NwaCegarLoop]: trace histogram [104, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:19:02,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:19:02,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 03:19:02,455 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:19:02,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:19:02,456 INFO L85 PathProgramCache]: Analyzing trace with hash 362429320, now seen corresponding path program 9 times [2024-11-14 03:19:02,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:19:02,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266241198] [2024-11-14 03:19:02,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:19:02,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:19:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:19:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5713 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 03:19:09,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:19:09,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266241198] [2024-11-14 03:19:09,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266241198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:19:09,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327177603] [2024-11-14 03:19:09,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:19:09,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:19:09,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:19:09,972 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:19:09,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:19:10,327 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:19:10,327 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:19:10,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-14 03:19:10,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:19:10,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5713 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 03:19:10,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:19:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5713 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 03:19:25,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327177603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:19:25,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603595030] [2024-11-14 03:19:25,852 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:19:25,852 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:19:25,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:19:25,852 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:19:25,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:19:25,946 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2024-11-14 03:19:25,957 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:19:26,613 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30178#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_9| Int)) (and (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9| 0) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_9|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_9| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9| 4) 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_9|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_9| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_9| 4)))))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:19:26,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:19:26,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:19:26,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 212 [2024-11-14 03:19:26,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439303265] [2024-11-14 03:19:26,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:19:26,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2024-11-14 03:19:26,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:19:26,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2024-11-14 03:19:26,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23229, Invalid=25391, Unknown=0, NotChecked=0, Total=48620 [2024-11-14 03:19:26,646 INFO L87 Difference]: Start difference. First operand 2263 states and 2890 transitions. Second operand has 213 states, 213 states have (on average 1.0422535211267605) internal successors, (222), 212 states have internal predecessors, (222), 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 03:20:59,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:20:59,672 INFO L93 Difference]: Finished difference Result 5586 states and 7687 transitions. [2024-11-14 03:20:59,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2024-11-14 03:20:59,673 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 1.0422535211267605) internal successors, (222), 212 states have internal predecessors, (222), 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 136 [2024-11-14 03:20:59,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:20:59,701 INFO L225 Difference]: With dead ends: 5586 [2024-11-14 03:20:59,701 INFO L226 Difference]: Without dead ends: 3429 [2024-11-14 03:20:59,710 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=23229, Invalid=25391, Unknown=0, NotChecked=0, Total=48620 [2024-11-14 03:20:59,711 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 8519 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 2844 mSolverCounterSat, 1333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8939 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 4177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1333 IncrementalHoareTripleChecker+Valid, 2844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:20:59,712 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8939 Valid, 834 Invalid, 4177 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1333 Valid, 2844 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-14 03:20:59,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2024-11-14 03:21:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 3429. [2024-11-14 03:21:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3006 states have (on average 1.2807717897538258) internal successors, (3850), 3006 states have internal predecessors, (3850), 421 states have call successors, (421), 1 states have call predecessors, (421), 1 states have return successors, (421), 421 states have call predecessors, (421), 421 states have call successors, (421) [2024-11-14 03:21:00,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 4692 transitions. [2024-11-14 03:21:00,417 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 4692 transitions. Word has length 136 [2024-11-14 03:21:00,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:21:00,418 INFO L471 AbstractCegarLoop]: Abstraction has 3429 states and 4692 transitions. [2024-11-14 03:21:00,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 1.0422535211267605) internal successors, (222), 212 states have internal predecessors, (222), 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 03:21:00,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 4692 transitions. [2024-11-14 03:21:00,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2024-11-14 03:21:00,422 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:21:00,422 INFO L215 NwaCegarLoop]: trace histogram [210, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:21:00,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 03:21:00,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 03:21:00,623 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:21:00,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:21:00,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1175951608, now seen corresponding path program 10 times [2024-11-14 03:21:00,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:21:00,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389811224] [2024-11-14 03:21:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:21:00,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:21:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 22408 backedges. 0 proven. 22155 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 03:21:32,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:21:32,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389811224] [2024-11-14 03:21:32,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389811224] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:21:32,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443937946] [2024-11-14 03:21:32,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:21:32,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:21:32,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:21:32,291 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:21:32,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde8c924-1cc9-451b-b0b1-58e058f7d9b2/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:21:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:21:33,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 2043 conjuncts, 212 conjuncts are in the unsatisfiable core [2024-11-14 03:21:33,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:21:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 22408 backedges. 0 proven. 22155 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 03:21:33,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:22:40,714 INFO L134 CoverageAnalysis]: Checked inductivity of 22408 backedges. 0 proven. 22155 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-11-14 03:22:40,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443937946] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:22:40,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [734340321] [2024-11-14 03:22:40,717 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 03:22:40,717 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:22:40,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:22:40,717 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:22:40,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:22:40,860 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2024-11-14 03:22:40,873 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:22:41,963 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49022#(and (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_10| Int)) (and (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_10| 0) (<= (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_10|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_10| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_10| 4) 4)) 1) (select (select |#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_10|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_10| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_10| 4)))))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 03:22:41,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:22:41,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:22:41,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [212, 212, 212] total 424 [2024-11-14 03:22:41,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527561629] [2024-11-14 03:22:41,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:22:41,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 425 states [2024-11-14 03:22:41,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:22:41,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 425 interpolants. [2024-11-14 03:22:41,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91387, Invalid=95669, Unknown=0, NotChecked=0, Total=187056 [2024-11-14 03:22:41,992 INFO L87 Difference]: Start difference. First operand 3429 states and 4692 transitions. Second operand has 425 states, 425 states have (on average 1.0211764705882354) internal successors, (434), 424 states have internal predecessors, (434), 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)