./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c --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_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/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_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/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_b01794c7-0760-46e3-aa1d-1a782f4b7af3/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 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:01:51,951 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:01:52,053 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:01:52,065 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:01:52,065 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:01:52,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:01:52,103 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:01:52,104 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:01:52,104 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:01:52,104 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:01:52,104 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:01:52,104 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:01:52,104 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:01:52,105 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:01:52,105 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:01:52,105 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:01:52,106 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:01:52,106 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:01:52,106 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:01:52,107 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:01:52,107 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:01:52,107 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:01:52,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:01:52,107 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:01:52,107 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:01:52,107 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:01:52,108 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:01:52,108 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:01:52,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:01:52,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:01:52,108 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:01:52,108 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:01:52,108 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:01:52,108 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:01:52,108 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:01:52,108 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:01:52,108 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:01:52,109 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:01:52,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:01:52,109 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:01:52,109 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:01:52,109 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:01:52,109 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:01:52,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:01:52,109 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:01:52,109 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:01:52,109 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:01:52,110 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_b01794c7-0760-46e3-aa1d-1a782f4b7af3/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 -> 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 [2024-11-14 04:01:52,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:01:52,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:01:52,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:01:52,585 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:01:52,586 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:01:52,587 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c Unable to find full path for "g++" [2024-11-14 04:01:54,600 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:01:54,879 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:01:54,884 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2024-11-14 04:01:54,893 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/data/e4b1f0b10/b249278821b546e18b15d84709f19056/FLAGfdf5d4a88 [2024-11-14 04:01:55,193 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/data/e4b1f0b10/b249278821b546e18b15d84709f19056 [2024-11-14 04:01:55,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:01:55,198 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:01:55,200 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:01:55,200 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:01:55,205 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:01:55,207 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:01:55" (1/1) ... [2024-11-14 04:01:55,209 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ee4ce55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:55, skipping insertion in model container [2024-11-14 04:01:55,210 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:01:55" (1/1) ... [2024-11-14 04:01:55,227 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:01:55,376 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_b01794c7-0760-46e3-aa1d-1a782f4b7af3/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c[421,434] [2024-11-14 04:01:55,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:01:55,404 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:01:55,414 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_b01794c7-0760-46e3-aa1d-1a782f4b7af3/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c[421,434] [2024-11-14 04:01:55,432 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:01:55,447 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:01:55,448 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:55 WrapperNode [2024-11-14 04:01:55,448 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:01:55,449 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:01:55,449 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:01:55,449 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:01:55,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:55" (1/1) ... [2024-11-14 04:01:55,463 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:55" (1/1) ... [2024-11-14 04:01:55,480 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2024-11-14 04:01:55,480 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:01:55,481 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:01:55,481 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:01:55,481 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:01:55,489 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:55" (1/1) ... [2024-11-14 04:01:55,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:55" (1/1) ... [2024-11-14 04:01:55,490 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:55" (1/1) ... [2024-11-14 04:01:55,491 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:55" (1/1) ... [2024-11-14 04:01:55,495 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:55" (1/1) ... [2024-11-14 04:01:55,499 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:55" (1/1) ... [2024-11-14 04:01:55,500 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:55" (1/1) ... [2024-11-14 04:01:55,500 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:55" (1/1) ... [2024-11-14 04:01:55,502 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:01:55,502 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:01:55,503 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:01:55,503 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:01:55,504 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:55" (1/1) ... [2024-11-14 04:01:55,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:01:55,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:01:55,537 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:01:55,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:01:55,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:01:55,567 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 04:01:55,567 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 04:01:55,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:01:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:01:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:01:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:01:55,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:01:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:01:55,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:01:55,644 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:01:55,646 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:01:55,887 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-14 04:01:55,891 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:01:55,963 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:01:55,964 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 04:01:55,964 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:01:55 BoogieIcfgContainer [2024-11-14 04:01:55,964 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:01:55,968 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:01:55,968 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:01:55,973 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:01:55,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:01:55" (1/3) ... [2024-11-14 04:01:55,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b461e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:01:55, skipping insertion in model container [2024-11-14 04:01:55,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:01:55" (2/3) ... [2024-11-14 04:01:55,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38b461e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:01:55, skipping insertion in model container [2024-11-14 04:01:55,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:01:55" (3/3) ... [2024-11-14 04:01:55,977 INFO L112 eAbstractionObserver]: Analyzing ICFG init-non-constant-2-n-u.c [2024-11-14 04:01:55,995 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:01:55,997 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG init-non-constant-2-n-u.c that has 2 procedures, 14 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-14 04:01:56,061 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:01:56,079 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;@38a5962, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:01:56,079 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:01:56,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:01:56,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 04:01:56,094 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:01:56,094 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:01:56,097 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:01:56,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:01:56,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1743156337, now seen corresponding path program 1 times [2024-11-14 04:01:56,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:01:56,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48339862] [2024-11-14 04:01:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:56,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:01:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:01:56,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:01:56,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48339862] [2024-11-14 04:01:56,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48339862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:01:56,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:01:56,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:01:56,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400777256] [2024-11-14 04:01:56,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:01:56,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:01:56,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:01:56,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:01:56,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:01:56,504 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:01:56,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:01:56,622 INFO L93 Difference]: Finished difference Result 30 states and 43 transitions. [2024-11-14 04:01:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:01:56,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2024-11-14 04:01:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:01:56,632 INFO L225 Difference]: With dead ends: 30 [2024-11-14 04:01:56,632 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 04:01:56,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:01:56,642 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:01:56,643 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 18 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:01:56,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 04:01:56,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2024-11-14 04:01:56,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:01:56,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2024-11-14 04:01:56,687 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 12 [2024-11-14 04:01:56,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:01:56,689 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2024-11-14 04:01:56,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:01:56,689 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2024-11-14 04:01:56,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 04:01:56,690 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:01:56,690 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:01:56,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:01:56,691 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:01:56,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:01:56,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1518228353, now seen corresponding path program 1 times [2024-11-14 04:01:56,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:01:56,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492958634] [2024-11-14 04:01:56,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:56,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:01:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:01:56,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:01:56,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492958634] [2024-11-14 04:01:56,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492958634] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:01:56,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:01:56,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:01:56,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746395810] [2024-11-14 04:01:56,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:01:56,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:01:56,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:01:56,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:01:56,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:01:56,946 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:01:57,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:01:57,027 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2024-11-14 04:01:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 04:01:57,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-11-14 04:01:57,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:01:57,030 INFO L225 Difference]: With dead ends: 32 [2024-11-14 04:01:57,030 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 04:01:57,030 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:01:57,031 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:01:57,032 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 29 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:01:57,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 04:01:57,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2024-11-14 04:01:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:01:57,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-11-14 04:01:57,043 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2024-11-14 04:01:57,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:01:57,044 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-11-14 04:01:57,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:01:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-11-14 04:01:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 04:01:57,045 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:01:57,045 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:01:57,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:01:57,046 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:01:57,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:01:57,050 INFO L85 PathProgramCache]: Analyzing trace with hash 866104193, now seen corresponding path program 1 times [2024-11-14 04:01:57,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:01:57,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145931426] [2024-11-14 04:01:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:57,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:01:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:01:57,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393306879] [2024-11-14 04:01:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:01:57,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:01:57,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:01:57,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:01:57,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:01:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:01:57,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 04:01:57,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:01:57,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:01:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:01:57,448 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:01:57,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2024-11-14 04:01:57,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2024-11-14 04:01:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:01:57,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:01:57,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145931426] [2024-11-14 04:01:57,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:01:57,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393306879] [2024-11-14 04:01:57,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393306879] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:01:57,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499477318] [2024-11-14 04:01:57,903 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 04:01:57,906 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:01:57,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:01:57,915 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:01:57,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:01:59,060 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:01:59,123 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:02:00,781 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '269#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (exists ((|v_ULTIMATE.start_main_~i~0#1_44| Int)) (and (= |ULTIMATE.start_main_~m~0#1| 1000) (<= |ULTIMATE.start_main_~q~0#1| |v_ULTIMATE.start_main_~i~0#1_44|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| 1500))) (= |ULTIMATE.start_main_~j~0#1| 0) (not (= (mod (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) (mod |ULTIMATE.start_main_~C~0#1| 4294967296))))' at error location [2024-11-14 04:02:00,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:02:00,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:02:00,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2024-11-14 04:02:00,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006239212] [2024-11-14 04:02:00,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:02:00,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 04:02:00,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:02:00,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 04:02:00,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-14 04:02:00,787 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:02:00,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:02:00,994 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2024-11-14 04:02:00,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:02:00,995 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2024-11-14 04:02:00,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:02:00,996 INFO L225 Difference]: With dead ends: 49 [2024-11-14 04:02:00,996 INFO L226 Difference]: Without dead ends: 47 [2024-11-14 04:02:00,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:02:00,997 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:02:00,998 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 58 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:02:00,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-14 04:02:01,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 22. [2024-11-14 04:02:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:02:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-11-14 04:02:01,008 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 15 [2024-11-14 04:02:01,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:02:01,008 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-11-14 04:02:01,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:02:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-11-14 04:02:01,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 04:02:01,010 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:02:01,010 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:02:01,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:02:01,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:01,212 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:02:01,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:02:01,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2048660564, now seen corresponding path program 1 times [2024-11-14 04:02:01,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:02:01,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044870347] [2024-11-14 04:02:01,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:01,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:02:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:02:01,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:02:01,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044870347] [2024-11-14 04:02:01,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044870347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:02:01,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801995954] [2024-11-14 04:02:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:01,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:01,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:02:01,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:02:01,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:02:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:01,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:02:01,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:02:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:02:01,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:02:01,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:02:01,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801995954] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:02:01,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [489868275] [2024-11-14 04:02:01,627 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:02:01,627 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:02:01,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:02:01,628 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:02:01,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:02:03,151 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:02:03,180 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:02:04,513 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '505#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:02:04,513 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:02:04,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:02:04,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-14 04:02:04,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223672723] [2024-11-14 04:02:04,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:02:04,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 04:02:04,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:02:04,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 04:02:04,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-11-14 04:02:04,515 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:02:04,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:02:04,627 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2024-11-14 04:02:04,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:02:04,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-11-14 04:02:04,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:02:04,629 INFO L225 Difference]: With dead ends: 57 [2024-11-14 04:02:04,629 INFO L226 Difference]: Without dead ends: 47 [2024-11-14 04:02:04,630 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:02:04,631 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:02:04,631 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 59 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:02:04,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-14 04:02:04,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2024-11-14 04:02:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:02:04,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2024-11-14 04:02:04,641 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 18 [2024-11-14 04:02:04,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:02:04,641 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2024-11-14 04:02:04,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:02:04,642 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2024-11-14 04:02:04,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 04:02:04,643 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:02:04,643 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:02:04,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:02:04,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:04,845 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:02:04,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:02:04,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1266536881, now seen corresponding path program 2 times [2024-11-14 04:02:04,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:02:04,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032692104] [2024-11-14 04:02:04,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:04,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:02:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:02:04,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046551587] [2024-11-14 04:02:04,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:02:04,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:04,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:02:04,883 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:02:04,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:02:04,968 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:02:04,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:02:04,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-14 04:02:04,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:02:05,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:02:05,143 INFO L349 Elim1Store]: treesize reduction 20, result has 42.9 percent of original size [2024-11-14 04:02:05,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 35 [2024-11-14 04:02:05,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:02:05,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 88 [2024-11-14 04:02:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:02:13,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:02:17,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2024-11-14 04:02:17,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 83 [2024-11-14 04:02:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:02:19,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:02:19,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032692104] [2024-11-14 04:02:19,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:02:19,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046551587] [2024-11-14 04:02:19,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046551587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:02:19,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1225978248] [2024-11-14 04:02:19,277 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 04:02:19,277 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:02:19,277 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:02:19,277 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:02:19,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:02:19,787 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:02:19,822 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:02:22,053 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '798#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (exists ((|v_ULTIMATE.start_main_~i~0#1_62| Int)) (and (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| 1500) (<= |ULTIMATE.start_main_~q~0#1| |v_ULTIMATE.start_main_~i~0#1_62|))) (= |ULTIMATE.start_main_~j~0#1| 0) (not (= (mod (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) (mod |ULTIMATE.start_main_~C~0#1| 4294967296))))' at error location [2024-11-14 04:02:22,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:02:22,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:02:22,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-11-14 04:02:22,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404375842] [2024-11-14 04:02:22,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:02:22,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 04:02:22,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:02:22,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 04:02:22,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=780, Unknown=2, NotChecked=0, Total=930 [2024-11-14 04:02:22,056 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:02:26,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:02:26,161 INFO L93 Difference]: Finished difference Result 113 states and 143 transitions. [2024-11-14 04:02:26,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 04:02:26,162 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2024-11-14 04:02:26,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:02:26,164 INFO L225 Difference]: With dead ends: 113 [2024-11-14 04:02:26,164 INFO L226 Difference]: Without dead ends: 111 [2024-11-14 04:02:26,166 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=417, Invalid=1743, Unknown=2, NotChecked=0, Total=2162 [2024-11-14 04:02:26,166 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 150 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:02:26,167 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 82 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-14 04:02:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-14 04:02:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 46. [2024-11-14 04:02:26,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:02:26,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2024-11-14 04:02:26,196 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 18 [2024-11-14 04:02:26,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:02:26,196 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2024-11-14 04:02:26,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:02:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2024-11-14 04:02:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 04:02:26,198 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:02:26,198 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:02:26,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 04:02:26,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:26,398 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:02:26,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:02:26,399 INFO L85 PathProgramCache]: Analyzing trace with hash 935502254, now seen corresponding path program 2 times [2024-11-14 04:02:26,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:02:26,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83165396] [2024-11-14 04:02:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:26,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:02:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:02:26,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671546692] [2024-11-14 04:02:26,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:02:26,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:26,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:02:26,433 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:02:26,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:02:26,498 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 04:02:26,498 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:02:26,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 04:02:26,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:02:26,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:02:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:02:26,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:02:26,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 65 [2024-11-14 04:02:26,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 75 [2024-11-14 04:02:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:02:27,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:02:27,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83165396] [2024-11-14 04:02:27,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:02:27,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671546692] [2024-11-14 04:02:27,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671546692] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:02:27,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338056683] [2024-11-14 04:02:27,082 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:02:27,082 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:02:27,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:02:27,082 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:02:27,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:02:27,416 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:02:27,446 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:02:28,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1219#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:02:28,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:02:28,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:02:28,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2024-11-14 04:02:28,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91241216] [2024-11-14 04:02:28,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:02:28,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 04:02:28,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:02:28,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 04:02:28,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-11-14 04:02:28,296 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:02:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:02:28,684 INFO L93 Difference]: Finished difference Result 96 states and 122 transitions. [2024-11-14 04:02:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 04:02:28,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-11-14 04:02:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:02:28,686 INFO L225 Difference]: With dead ends: 96 [2024-11-14 04:02:28,686 INFO L226 Difference]: Without dead ends: 94 [2024-11-14 04:02:28,686 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2024-11-14 04:02:28,687 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:02:28,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 139 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:02:28,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-14 04:02:28,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 52. [2024-11-14 04:02:28,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.375) internal successors, (66), 48 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:02:28,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2024-11-14 04:02:28,713 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 19 [2024-11-14 04:02:28,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:02:28,713 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2024-11-14 04:02:28,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:02:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2024-11-14 04:02:28,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 04:02:28,714 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:02:28,714 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:02:28,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:02:28,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:28,915 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:02:28,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:02:28,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1632094117, now seen corresponding path program 1 times [2024-11-14 04:02:28,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:02:28,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143394694] [2024-11-14 04:02:28,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:28,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:02:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:02:29,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:02:29,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143394694] [2024-11-14 04:02:29,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143394694] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:02:29,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151575744] [2024-11-14 04:02:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:29,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:29,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:02:29,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:02:29,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:02:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:29,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:02:29,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:02:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:02:29,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:02:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:02:29,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151575744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:02:29,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [998295034] [2024-11-14 04:02:29,302 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:02:29,302 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:02:29,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:02:29,303 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:02:29,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:02:29,744 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:02:29,772 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:02:30,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1592#(and (<= (+ |ULTIMATE.start_main_~j~0#1| 1) |ULTIMATE.start_main_~s~0#1|) (not (= (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) 4294967296))) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:02:30,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:02:30,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:02:30,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-14 04:02:30,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393134428] [2024-11-14 04:02:30,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:02:30,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 04:02:30,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:02:30,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 04:02:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-11-14 04:02:30,681 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:02:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:02:30,815 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2024-11-14 04:02:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:02:30,816 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2024-11-14 04:02:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:02:30,817 INFO L225 Difference]: With dead ends: 110 [2024-11-14 04:02:30,817 INFO L226 Difference]: Without dead ends: 88 [2024-11-14 04:02:30,818 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:02:30,818 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:02:30,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 36 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:02:30,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-14 04:02:30,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2024-11-14 04:02:30,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:02:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2024-11-14 04:02:30,850 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 20 [2024-11-14 04:02:30,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:02:30,850 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2024-11-14 04:02:30,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:02:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2024-11-14 04:02:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 04:02:30,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:02:30,852 INFO L215 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:02:30,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 04:02:31,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 04:02:31,053 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:02:31,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:02:31,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1865619473, now seen corresponding path program 3 times [2024-11-14 04:02:31,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:02:31,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101093730] [2024-11-14 04:02:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:31,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:02:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:02:31,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:02:31,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101093730] [2024-11-14 04:02:31,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101093730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:02:31,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640087179] [2024-11-14 04:02:31,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:02:31,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:31,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:02:31,288 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:02:31,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:02:31,346 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:02:31,346 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:02:31,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:02:31,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:02:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:02:31,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:02:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:02:31,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640087179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:02:31,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697787102] [2024-11-14 04:02:31,510 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 04:02:31,510 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:02:31,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:02:31,511 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:02:31,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:02:31,856 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:02:31,880 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:02:33,278 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2007#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (exists ((|v_ULTIMATE.start_main_~i~0#1_99| Int)) (and (= |ULTIMATE.start_main_~m~0#1| 1000) (<= |ULTIMATE.start_main_~q~0#1| |v_ULTIMATE.start_main_~i~0#1_99|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| 1500))) (= |ULTIMATE.start_main_~j~0#1| 0) (not (= (mod (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) (mod |ULTIMATE.start_main_~C~0#1| 4294967296))))' at error location [2024-11-14 04:02:33,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:02:33,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:02:33,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-14 04:02:33,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823234373] [2024-11-14 04:02:33,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:02:33,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 04:02:33,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:02:33,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 04:02:33,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2024-11-14 04:02:33,280 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:02:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:02:33,472 INFO L93 Difference]: Finished difference Result 125 states and 162 transitions. [2024-11-14 04:02:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:02:33,473 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-14 04:02:33,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:02:33,474 INFO L225 Difference]: With dead ends: 125 [2024-11-14 04:02:33,474 INFO L226 Difference]: Without dead ends: 92 [2024-11-14 04:02:33,475 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2024-11-14 04:02:33,475 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:02:33,476 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 63 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:02:33,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-14 04:02:33,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 76. [2024-11-14 04:02:33,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.375) internal successors, (99), 72 states have internal predecessors, (99), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:02:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2024-11-14 04:02:33,515 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 21 [2024-11-14 04:02:33,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:02:33,516 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2024-11-14 04:02:33,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:02:33,516 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2024-11-14 04:02:33,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 04:02:33,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:02:33,517 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:02:33,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:02:33,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:33,720 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:02:33,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:02:33,721 INFO L85 PathProgramCache]: Analyzing trace with hash 674437313, now seen corresponding path program 4 times [2024-11-14 04:02:33,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:02:33,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317071483] [2024-11-14 04:02:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:02:33,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:02:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:02:33,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871713427] [2024-11-14 04:02:33,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:02:33,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:02:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:02:33,758 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:02:33,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:02:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:02:33,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 04:02:33,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:02:33,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:02:33,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:02:33,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2024-11-14 04:02:34,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:02:34,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:02:34,233 INFO L349 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2024-11-14 04:02:34,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 58 [2024-11-14 04:02:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:02:35,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:03:05,958 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_148| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_104| Int) (|v_ULTIMATE.start_main_~j~0#1_147| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_104| (+ |v_ULTIMATE.start_main_~i~0#1_105| 1)) (= (mod (select (let ((.cse0 (* |c_ULTIMATE.start_main_~n~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_148| 4) (* .cse0 |v_ULTIMATE.start_main_~i~0#1_105|)) (+ |c_ULTIMATE.start_main_~C~0#1| |v_ULTIMATE.start_main_~j~0#1_148| |v_ULTIMATE.start_main_~i~0#1_105|)) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_147| 4) (* .cse0 |v_ULTIMATE.start_main_~i~0#1_104|)) (+ |c_ULTIMATE.start_main_~C~0#1| |v_ULTIMATE.start_main_~j~0#1_147| |v_ULTIMATE.start_main_~i~0#1_104|))) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296)) (< |v_ULTIMATE.start_main_~j~0#1_147| 0))) (< |v_ULTIMATE.start_main_~j~0#1_148| 0))) (< |v_ULTIMATE.start_main_~i~0#1_105| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2024-11-14 04:03:06,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2024-11-14 04:03:06,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 396 treesize of output 392 [2024-11-14 04:04:04,069 WARN L286 SmtUtils]: Spent 14.01s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:04:09,415 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse2 (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_105| .cse0) (< 0 (* |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_105|)) (forall ((v_z_18 Int) (v_y_18 Int)) (let ((.cse1 (+ v_z_18 (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_18 4294967295) 4294967296)))) (or (= .cse1 0) (< 4294967295 v_z_18) (< v_z_18 0) (< (+ (* v_y_18 4294967296) v_z_18) (+ |v_ULTIMATE.start_main_~i~0#1_105| 1)) (= 4294967296 .cse1)))))) (forall ((v_z_16 Int) (v_y_16 Int)) (or (< 4294967295 v_z_16) (< 0 (+ (* |c_ULTIMATE.start_main_~n~0#1| v_z_16) (* (* |c_ULTIMATE.start_main_~n~0#1| v_y_16) 4294967296))) (< (+ v_z_16 (* v_y_16 4294967296)) .cse2) (< (+ (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_16 4294967295) 4294967296) v_z_16) 4294967297))) (forall ((v_z_16 Int) (v_y_16 Int)) (or (< 4294967295 v_z_16) (< v_z_16 1) (< 0 (+ (* |c_ULTIMATE.start_main_~n~0#1| v_z_16) (* (* |c_ULTIMATE.start_main_~n~0#1| v_y_16) 4294967296))) (< (+ v_z_16 (* v_y_16 4294967296)) .cse2) (= 4294967296 (+ (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_16 4294967295) 4294967296) v_z_16)))) (forall ((v_z_16 Int) (v_y_16 Int)) (let ((.cse3 (+ (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_16 4294967295) 4294967296) v_z_16))) (or (< 0 (+ (* |c_ULTIMATE.start_main_~n~0#1| v_z_16) (* (* |c_ULTIMATE.start_main_~n~0#1| v_y_16) 4294967296))) (< v_z_16 0) (< (+ v_z_16 (* v_y_16 4294967296)) .cse2) (= .cse3 0) (< 4294967295 .cse3)))) (= (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_105| .cse0) (< 0 (* |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_105|)) (forall ((v_z_18 Int) (v_y_18 Int)) (let ((.cse4 (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_18 4294967295) 4294967296))) (or (< .cse4 1) (< 4294967295 v_z_18) (< v_z_18 0) (< (+ (* v_y_18 4294967296) v_z_18) (+ |v_ULTIMATE.start_main_~i~0#1_105| 1)) (= 4294967296 (+ v_z_18 .cse4))))))) (forall ((|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_105| .cse0) (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |v_ULTIMATE.start_main_~i~0#1_105|) |v_ULTIMATE.start_main_~i~0#1_105|) 4294967296) 0) (< 0 (* |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_105|)))) (= (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1|) 0) (forall ((v_z_16 Int) (v_y_16 Int)) (let ((.cse5 (+ (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_16 4294967295) 4294967296) v_z_16))) (or (< 4294967295 v_z_16) (< 0 (+ (* |c_ULTIMATE.start_main_~n~0#1| v_z_16) (* (* |c_ULTIMATE.start_main_~n~0#1| v_y_16) 4294967296))) (< v_z_16 0) (< (+ v_z_16 (* v_y_16 4294967296)) .cse2) (= .cse5 0) (= 4294967296 .cse5)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (forall ((v_z_18 Int) (v_y_18 Int)) (or (< (+ v_z_18 (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_18 4294967295) 4294967296)) 4294967297) (< 4294967295 v_z_18) (< (+ (* v_y_18 4294967296) v_z_18) (+ |v_ULTIMATE.start_main_~i~0#1_105| 1)))) (< |v_ULTIMATE.start_main_~i~0#1_105| .cse0) (< 0 (* |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_105|)))) (forall ((v_z_16 Int) (v_y_16 Int)) (let ((.cse6 (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_16 4294967295) 4294967296))) (or (< 4294967295 v_z_16) (< 0 (+ (* |c_ULTIMATE.start_main_~n~0#1| v_z_16) (* (* |c_ULTIMATE.start_main_~n~0#1| v_y_16) 4294967296))) (< v_z_16 0) (< .cse6 1) (< (+ v_z_16 (* v_y_16 4294967296)) .cse2) (= 4294967296 (+ .cse6 v_z_16))))) (forall ((|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (forall ((v_z_18 Int) (v_y_18 Int)) (let ((.cse7 (+ v_z_18 (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_18 4294967295) 4294967296)))) (or (< 4294967295 .cse7) (= .cse7 0) (< v_z_18 0) (< (+ (* v_y_18 4294967296) v_z_18) (+ |v_ULTIMATE.start_main_~i~0#1_105| 1))))) (< |v_ULTIMATE.start_main_~i~0#1_105| .cse0) (< 0 (* |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_105|)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (forall ((v_z_18 Int) (v_y_18 Int)) (or (< v_z_18 1) (< 4294967295 v_z_18) (< (+ (* v_y_18 4294967296) v_z_18) (+ |v_ULTIMATE.start_main_~i~0#1_105| 1)) (= 4294967296 (+ v_z_18 (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_18 4294967295) 4294967296))))) (< |v_ULTIMATE.start_main_~i~0#1_105| .cse0) (< 0 (* |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_105|)))))) is different from false [2024-11-14 04:04:15,635 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse4 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (let ((.cse0 (forall ((|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_105| .cse4) (< 0 (* |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_105|))))) (.cse1 (+ 2 |c_ULTIMATE.start_main_~i~0#1|))) (and (or (forall ((v_z_18 Int)) (or (< (+ v_z_18 (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_18 4294967295) 4294967296)) 4294967297) (< 4294967295 v_z_18))) .cse0) (forall ((v_z_16 Int) (v_y_16 Int)) (or (< 4294967295 v_z_16) (< 0 (+ (* |c_ULTIMATE.start_main_~n~0#1| v_z_16) (* (* |c_ULTIMATE.start_main_~n~0#1| v_y_16) 4294967296))) (< (+ v_z_16 (* v_y_16 4294967296)) .cse1) (< (+ (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_16 4294967295) 4294967296) v_z_16) 4294967297))) (or .cse0 (forall ((v_z_18 Int)) (let ((.cse2 (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_18 4294967295) 4294967296))) (or (< .cse2 1) (< 4294967295 v_z_18) (< v_z_18 0) (= 4294967296 (+ v_z_18 .cse2)))))) (forall ((v_z_16 Int) (v_y_16 Int)) (or (< 4294967295 v_z_16) (< v_z_16 1) (< 0 (+ (* |c_ULTIMATE.start_main_~n~0#1| v_z_16) (* (* |c_ULTIMATE.start_main_~n~0#1| v_y_16) 4294967296))) (< (+ v_z_16 (* v_y_16 4294967296)) .cse1) (= 4294967296 (+ (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_16 4294967295) 4294967296) v_z_16)))) (forall ((v_z_16 Int) (v_y_16 Int)) (let ((.cse3 (+ (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_16 4294967295) 4294967296) v_z_16))) (or (< 0 (+ (* |c_ULTIMATE.start_main_~n~0#1| v_z_16) (* (* |c_ULTIMATE.start_main_~n~0#1| v_y_16) 4294967296))) (< v_z_16 0) (< (+ v_z_16 (* v_y_16 4294967296)) .cse1) (= .cse3 0) (< 4294967295 .cse3)))) (= (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_105| .cse4) (= (mod (+ (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |v_ULTIMATE.start_main_~i~0#1_105|) |v_ULTIMATE.start_main_~i~0#1_105|) 4294967296) 0) (< 0 (* |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_105|)))) (or .cse0 (forall ((v_z_18 Int)) (let ((.cse5 (+ v_z_18 (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_18 4294967295) 4294967296)))) (or (= .cse5 0) (< 4294967295 v_z_18) (< v_z_18 0) (= 4294967296 .cse5))))) (or .cse0 (forall ((v_z_18 Int)) (or (< v_z_18 1) (< 4294967295 v_z_18) (= 4294967296 (+ v_z_18 (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_18 4294967295) 4294967296)))))) (= (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1|) 0) (forall ((v_z_16 Int) (v_y_16 Int)) (let ((.cse6 (+ (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_16 4294967295) 4294967296) v_z_16))) (or (< 4294967295 v_z_16) (< 0 (+ (* |c_ULTIMATE.start_main_~n~0#1| v_z_16) (* (* |c_ULTIMATE.start_main_~n~0#1| v_y_16) 4294967296))) (< v_z_16 0) (< (+ v_z_16 (* v_y_16 4294967296)) .cse1) (= .cse6 0) (= 4294967296 .cse6)))) (or .cse0 (forall ((v_z_18 Int)) (let ((.cse7 (+ v_z_18 (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_18 4294967295) 4294967296)))) (or (< 4294967295 .cse7) (= .cse7 0) (< v_z_18 0))))) (forall ((v_z_16 Int) (v_y_16 Int)) (let ((.cse8 (mod (* |c_ULTIMATE.start_main_~n~0#1| v_z_16 4294967295) 4294967296))) (or (< 4294967295 v_z_16) (< 0 (+ (* |c_ULTIMATE.start_main_~n~0#1| v_z_16) (* (* |c_ULTIMATE.start_main_~n~0#1| v_y_16) 4294967296))) (< v_z_16 0) (< .cse8 1) (< (+ v_z_16 (* v_y_16 4294967296)) .cse1) (= 4294967296 (+ .cse8 v_z_16)))))))) is different from false [2024-11-14 04:04:15,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:04:15,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317071483] [2024-11-14 04:04:15,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:04:15,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871713427] [2024-11-14 04:04:15,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871713427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:04:15,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [582227696] [2024-11-14 04:04:15,644 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 04:04:15,644 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:04:15,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:04:15,645 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:04:15,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:04:15,864 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:04:15,887 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:04:21,177 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2481#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (not (= (mod (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) |ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) (mod |ULTIMATE.start_main_~C~0#1| 4294967296))))' at error location [2024-11-14 04:04:21,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:04:21,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:04:21,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-11-14 04:04:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639155077] [2024-11-14 04:04:21,177 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 04:04:21,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 04:04:21,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:04:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 04:04:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=813, Unknown=25, NotChecked=186, Total=1190 [2024-11-14 04:04:21,178 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:04:23,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 04:04:26,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:04:28,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:04:30,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-14 04:04:33,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 04:04:35,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 04:04:36,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:04:36,397 INFO L93 Difference]: Finished difference Result 114 states and 149 transitions. [2024-11-14 04:04:36,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 04:04:36,398 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2024-11-14 04:04:36,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:04:36,399 INFO L225 Difference]: With dead ends: 114 [2024-11-14 04:04:36,399 INFO L226 Difference]: Without dead ends: 112 [2024-11-14 04:04:36,400 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 74.1s TimeCoverageRelationStatistics Valid=299, Invalid=1328, Unknown=25, NotChecked=240, Total=1892 [2024-11-14 04:04:36,400 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 10 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2024-11-14 04:04:36,401 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 71 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 262 Invalid, 6 Unknown, 0 Unchecked, 12.7s Time] [2024-11-14 04:04:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-14 04:04:36,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 69. [2024-11-14 04:04:36,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 65 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:04:36,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2024-11-14 04:04:36,454 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 21 [2024-11-14 04:04:36,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:04:36,454 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2024-11-14 04:04:36,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:04:36,455 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2024-11-14 04:04:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 04:04:36,459 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:04:36,459 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:04:36,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:04:36,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:04:36,660 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:04:36,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:04:36,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2054592353, now seen corresponding path program 3 times [2024-11-14 04:04:36,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:04:36,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57264010] [2024-11-14 04:04:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:04:36,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:04:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:04:36,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647351842] [2024-11-14 04:04:36,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:04:36,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:04:36,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:04:36,705 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:04:36,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:04:36,785 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:04:36,785 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:04:36,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 04:04:36,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:04:36,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:04:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:04:37,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:04:37,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 67 [2024-11-14 04:04:37,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 79 [2024-11-14 04:04:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:04:37,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:04:37,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57264010] [2024-11-14 04:04:37,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:04:37,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647351842] [2024-11-14 04:04:37,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647351842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:04:37,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1775726243] [2024-11-14 04:04:37,794 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:04:37,794 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:04:37,795 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:04:37,795 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:04:37,795 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:04:38,534 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:04:38,558 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:04:40,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2957#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:04:40,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:04:40,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:04:40,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2024-11-14 04:04:40,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48477359] [2024-11-14 04:04:40,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:04:40,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:04:40,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:04:40,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:04:40,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-11-14 04:04:40,311 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:04:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:04:40,777 INFO L93 Difference]: Finished difference Result 101 states and 127 transitions. [2024-11-14 04:04:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 04:04:40,777 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-11-14 04:04:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:04:40,778 INFO L225 Difference]: With dead ends: 101 [2024-11-14 04:04:40,778 INFO L226 Difference]: Without dead ends: 99 [2024-11-14 04:04:40,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2024-11-14 04:04:40,780 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:04:40,780 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 123 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:04:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-14 04:04:40,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2024-11-14 04:04:40,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.3235294117647058) internal successors, (90), 68 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:04:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2024-11-14 04:04:40,812 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 23 [2024-11-14 04:04:40,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:04:40,812 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2024-11-14 04:04:40,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:04:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2024-11-14 04:04:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 04:04:40,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:04:40,813 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:04:40,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 04:04:41,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 04:04:41,014 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:04:41,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:04:41,015 INFO L85 PathProgramCache]: Analyzing trace with hash -773920130, now seen corresponding path program 4 times [2024-11-14 04:04:41,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:04:41,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211022092] [2024-11-14 04:04:41,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:04:41,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:04:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:04:41,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135670763] [2024-11-14 04:04:41,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:04:41,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:04:41,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:04:41,037 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:04:41,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:04:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:04:41,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 04:04:41,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:04:41,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:04:41,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:04:41,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2024-11-14 04:04:41,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:04:41,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:04:41,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:04:41,405 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:04:41,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2024-11-14 04:04:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:04:41,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:04:47,068 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_121| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_187| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_186| Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_186| (+ |v_ULTIMATE.start_main_~j~0#1_187| 1)) (= (mod (+ |c_ULTIMATE.start_main_~C~0#1| 1) 4294967296) (mod (select (let ((.cse0 (* (* |c_ULTIMATE.start_main_~n~0#1| 4) |v_ULTIMATE.start_main_~i~0#1_121|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ (* |v_ULTIMATE.start_main_~j~0#1_187| 4) |c_ULTIMATE.start_main_~#A~0#1.offset| .cse0) (+ |c_ULTIMATE.start_main_~C~0#1| |v_ULTIMATE.start_main_~j~0#1_187| |v_ULTIMATE.start_main_~i~0#1_121|)) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_186| 4) .cse0) (+ |c_ULTIMATE.start_main_~C~0#1| |v_ULTIMATE.start_main_~j~0#1_186| |v_ULTIMATE.start_main_~i~0#1_121|))) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| 4)) 4294967296)))) (< |v_ULTIMATE.start_main_~j~0#1_187| 0))) (< |v_ULTIMATE.start_main_~i~0#1_121| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2024-11-14 04:04:47,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 137 [2024-11-14 04:04:47,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2191 treesize of output 2151 [2024-11-14 04:04:58,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:04:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211022092] [2024-11-14 04:04:58,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:04:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135670763] [2024-11-14 04:04:58,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135670763] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:04:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1901543515] [2024-11-14 04:04:58,860 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:04:58,860 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:04:58,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:04:58,861 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:04:58,861 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:04:59,658 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:04:59,672 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:05:01,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3385#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:05:01,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:05:01,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:05:01,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-11-14 04:05:01,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057983565] [2024-11-14 04:05:01,646 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 04:05:01,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 04:05:01,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:01,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 04:05:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=972, Unknown=3, NotChecked=64, Total=1190 [2024-11-14 04:05:01,648 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:05:02,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:05:02,733 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2024-11-14 04:05:02,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 04:05:02,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-11-14 04:05:02,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:05:02,734 INFO L225 Difference]: With dead ends: 115 [2024-11-14 04:05:02,735 INFO L226 Difference]: Without dead ends: 113 [2024-11-14 04:05:02,736 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=241, Invalid=1400, Unknown=3, NotChecked=78, Total=1722 [2024-11-14 04:05:02,736 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:05:02,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 86 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:05:02,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-14 04:05:02,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2024-11-14 04:05:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 74 states have internal predecessors, (98), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:05:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2024-11-14 04:05:02,790 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 23 [2024-11-14 04:05:02,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:05:02,790 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2024-11-14 04:05:02,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:05:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2024-11-14 04:05:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-14 04:05:02,792 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:05:02,792 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:05:02,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:05:02,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 04:05:02,996 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:05:02,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:05:02,996 INFO L85 PathProgramCache]: Analyzing trace with hash -371700147, now seen corresponding path program 2 times [2024-11-14 04:05:02,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:05:02,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146840640] [2024-11-14 04:05:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:05:02,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:05:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:05:03,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54921138] [2024-11-14 04:05:03,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:05:03,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:05:03,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:05:03,016 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:05:03,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:05:03,115 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 04:05:03,115 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:05:03,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-14 04:05:03,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:05:03,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-11-14 04:05:03,708 INFO L349 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2024-11-14 04:05:03,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 37 [2024-11-14 04:05:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:05:03,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:05:05,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2024-11-14 04:05:05,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 97 [2024-11-14 04:05:06,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2024-11-14 04:05:06,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 97 [2024-11-14 04:05:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:05:10,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:05:10,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146840640] [2024-11-14 04:05:10,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:05:10,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54921138] [2024-11-14 04:05:10,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54921138] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:05:10,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016722989] [2024-11-14 04:05:10,124 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:05:10,124 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:05:10,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:05:10,125 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:05:10,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:05:10,694 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:05:10,710 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:05:12,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3876#(and (<= (+ |ULTIMATE.start_main_~j~0#1| 1) |ULTIMATE.start_main_~s~0#1|) (not (= (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) 4294967296))) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:05:12,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:05:12,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:05:12,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-11-14 04:05:12,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42835130] [2024-11-14 04:05:12,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:05:12,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 04:05:12,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:05:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 04:05:12,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1202, Unknown=1, NotChecked=0, Total=1406 [2024-11-14 04:05:12,376 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 27 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:05:46,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-14 04:05:49,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-14 04:05:52,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-14 04:05:54,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-14 04:06:05,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-14 04:06:07,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-14 04:06:09,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-14 04:06:23,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-14 04:06:27,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-14 04:06:28,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-14 04:06:30,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2024-11-14 04:06:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:06:30,955 INFO L93 Difference]: Finished difference Result 195 states and 244 transitions. [2024-11-14 04:06:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-14 04:06:30,956 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2024-11-14 04:06:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:06:30,957 INFO L225 Difference]: With dead ends: 195 [2024-11-14 04:06:30,957 INFO L226 Difference]: Without dead ends: 193 [2024-11-14 04:06:30,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 58.7s TimeCoverageRelationStatistics Valid=767, Invalid=3776, Unknown=13, NotChecked=0, Total=4556 [2024-11-14 04:06:30,959 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 241 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 88 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:06:30,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 98 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 408 Invalid, 10 Unknown, 0 Unchecked, 24.9s Time] [2024-11-14 04:06:30,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-11-14 04:06:31,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 118. [2024-11-14 04:06:31,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.2982456140350878) internal successors, (148), 114 states have internal predecessors, (148), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:06:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 152 transitions. [2024-11-14 04:06:31,046 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 152 transitions. Word has length 23 [2024-11-14 04:06:31,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:06:31,046 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 152 transitions. [2024-11-14 04:06:31,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:06:31,046 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 152 transitions. [2024-11-14 04:06:31,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-14 04:06:31,047 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:06:31,047 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:06:31,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 04:06:31,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:06:31,248 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:06:31,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:06:31,248 INFO L85 PathProgramCache]: Analyzing trace with hash 786693068, now seen corresponding path program 5 times [2024-11-14 04:06:31,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:06:31,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027062652] [2024-11-14 04:06:31,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:06:31,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:06:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:06:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:06:31,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:06:31,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027062652] [2024-11-14 04:06:31,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027062652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:06:31,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609733522] [2024-11-14 04:06:31,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:06:31,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:06:31,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:06:31,503 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:06:31,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:06:31,570 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 04:06:31,570 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:06:31,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 04:06:31,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:06:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:06:31,711 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:06:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:06:31,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609733522] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:06:31,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1470875088] [2024-11-14 04:06:31,822 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:06:31,822 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:06:31,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:06:31,823 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:06:31,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:06:32,393 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:06:32,406 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:06:33,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4619#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:06:33,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:06:33,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:06:33,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-14 04:06:33,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169245216] [2024-11-14 04:06:33,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:06:33,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:06:33,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:06:33,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:06:33,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2024-11-14 04:06:33,751 INFO L87 Difference]: Start difference. First operand 118 states and 152 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:06:34,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:06:34,091 INFO L93 Difference]: Finished difference Result 251 states and 324 transitions. [2024-11-14 04:06:34,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:06:34,091 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2024-11-14 04:06:34,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:06:34,093 INFO L225 Difference]: With dead ends: 251 [2024-11-14 04:06:34,093 INFO L226 Difference]: Without dead ends: 177 [2024-11-14 04:06:34,093 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2024-11-14 04:06:34,094 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:06:34,094 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 112 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:06:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-14 04:06:34,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2024-11-14 04:06:34,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 153 states have (on average 1.3398692810457515) internal successors, (205), 153 states have internal predecessors, (205), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:06:34,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2024-11-14 04:06:34,271 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 26 [2024-11-14 04:06:34,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:06:34,271 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2024-11-14 04:06:34,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:06:34,271 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2024-11-14 04:06:34,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-14 04:06:34,272 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:06:34,272 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:06:34,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:06:34,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:06:34,473 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:06:34,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:06:34,473 INFO L85 PathProgramCache]: Analyzing trace with hash -231370802, now seen corresponding path program 6 times [2024-11-14 04:06:34,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:06:34,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952492777] [2024-11-14 04:06:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:06:34,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:06:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:06:34,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508054804] [2024-11-14 04:06:34,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:06:34,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:06:34,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:06:34,514 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:06:34,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:06:34,606 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:06:34,606 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:06:34,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-14 04:06:34,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:06:34,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:06:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:06:34,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:06:35,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 67 [2024-11-14 04:06:35,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 79 [2024-11-14 04:06:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:06:35,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:06:35,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952492777] [2024-11-14 04:06:35,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:06:35,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508054804] [2024-11-14 04:06:35,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508054804] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:06:35,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1733842800] [2024-11-14 04:06:35,385 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:06:35,385 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:06:35,385 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:06:35,385 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:06:35,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:06:35,654 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:06:35,670 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:06:36,671 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5473#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:06:36,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:06:36,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:06:36,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2024-11-14 04:06:36,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769211057] [2024-11-14 04:06:36,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:06:36,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 04:06:36,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:06:36,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 04:06:36,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2024-11-14 04:06:36,673 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:06:37,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:06:37,333 INFO L93 Difference]: Finished difference Result 198 states and 254 transitions. [2024-11-14 04:06:37,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:06:37,333 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2024-11-14 04:06:37,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:06:37,335 INFO L225 Difference]: With dead ends: 198 [2024-11-14 04:06:37,335 INFO L226 Difference]: Without dead ends: 196 [2024-11-14 04:06:37,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2024-11-14 04:06:37,335 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:06:37,336 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 164 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:06:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-11-14 04:06:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 160. [2024-11-14 04:06:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 156 states have (on average 1.3333333333333333) internal successors, (208), 156 states have internal predecessors, (208), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:06:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 212 transitions. [2024-11-14 04:06:37,481 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 212 transitions. Word has length 27 [2024-11-14 04:06:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:06:37,481 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 212 transitions. [2024-11-14 04:06:37,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:06:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 212 transitions. [2024-11-14 04:06:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 04:06:37,482 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:06:37,482 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:06:37,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:06:37,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:06:37,683 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:06:37,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:06:37,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1333978223, now seen corresponding path program 7 times [2024-11-14 04:06:37,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:06:37,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948099767] [2024-11-14 04:06:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:06:37,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:06:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:06:37,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994303336] [2024-11-14 04:06:37,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:06:37,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:06:37,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:06:37,719 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:06:37,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:06:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:06:37,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-14 04:06:37,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:06:37,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:06:38,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:06:38,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2024-11-14 04:06:38,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:06:38,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:06:38,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:06:38,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:06:38,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2024-11-14 04:06:38,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:06:38,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:06:38,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:06:38,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:06:38,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:06:38,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:06:38,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:06:38,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 67 [2024-11-14 04:06:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:06:39,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:07:42,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 175 [2024-11-14 04:07:42,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1769 treesize of output 1753 [2024-11-14 04:08:22,423 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_168| Int)) (or (= 2 (mod (+ 2 (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |v_ULTIMATE.start_main_~i~0#1_168|) |v_ULTIMATE.start_main_~i~0#1_168|) 4294967296)) (< |v_ULTIMATE.start_main_~i~0#1_168| .cse0) (< 0 (* |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_168|)))) (= (+ |c_ULTIMATE.start_main_~j~0#1| (* |c_ULTIMATE.start_main_~n~0#1| |c_ULTIMATE.start_main_~i~0#1|)) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_168| Int)) (or (= 2 (mod (+ 2 (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |v_ULTIMATE.start_main_~i~0#1_168|) |v_ULTIMATE.start_main_~i~0#1_168|) 4294967296)) (< 1 (* |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_168|)) (< |v_ULTIMATE.start_main_~i~0#1_168| .cse0))) (forall ((|v_ULTIMATE.start_main_~i~0#1_168| Int)) (or (= 2 (mod (+ 2 (* |c_ULTIMATE.start_main_~n~0#1| 4294967295 |v_ULTIMATE.start_main_~i~0#1_168|) |v_ULTIMATE.start_main_~i~0#1_168|) 4294967296)) (< |v_ULTIMATE.start_main_~i~0#1_168| .cse0) (< 2 (* |c_ULTIMATE.start_main_~n~0#1| |v_ULTIMATE.start_main_~i~0#1_168|)))) (= 2 (mod (+ |c_ULTIMATE.start_main_~j~0#1| 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)))) is different from false [2024-11-14 04:08:25,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:25,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948099767] [2024-11-14 04:08:25,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:08:25,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994303336] [2024-11-14 04:08:25,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994303336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:08:25,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2073169886] [2024-11-14 04:08:25,909 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:08:25,909 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:08:25,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:08:25,910 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:08:25,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:08:26,214 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:08:26,240 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:08:28,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6243#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:08:28,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:08:28,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:08:28,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-14 04:08:28,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752594037] [2024-11-14 04:08:28,266 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 04:08:28,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:08:28,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:28,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:08:28,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1232, Unknown=32, NotChecked=74, Total=1560 [2024-11-14 04:08:28,267 INFO L87 Difference]: Start difference. First operand 160 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:08:42,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:08:42,798 INFO L93 Difference]: Finished difference Result 265 states and 335 transitions. [2024-11-14 04:08:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 04:08:42,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2024-11-14 04:08:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:08:42,800 INFO L225 Difference]: With dead ends: 265 [2024-11-14 04:08:42,801 INFO L226 Difference]: Without dead ends: 263 [2024-11-14 04:08:42,802 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 99.6s TimeCoverageRelationStatistics Valid=353, Invalid=1775, Unknown=38, NotChecked=90, Total=2256 [2024-11-14 04:08:42,802 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:08:42,803 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 120 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-14 04:08:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-14 04:08:42,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 166. [2024-11-14 04:08:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 162 states have (on average 1.3333333333333333) internal successors, (216), 162 states have internal predecessors, (216), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:08:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 220 transitions. [2024-11-14 04:08:42,957 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 220 transitions. Word has length 28 [2024-11-14 04:08:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:08:42,957 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 220 transitions. [2024-11-14 04:08:42,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:08:42,957 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 220 transitions. [2024-11-14 04:08:42,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 04:08:42,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:08:42,958 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:08:42,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 04:08:43,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 04:08:43,162 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:08:43,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:08:43,163 INFO L85 PathProgramCache]: Analyzing trace with hash -448473218, now seen corresponding path program 3 times [2024-11-14 04:08:43,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:08:43,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224234114] [2024-11-14 04:08:43,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:08:43,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:08:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:08:43,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637026633] [2024-11-14 04:08:43,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:08:43,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:08:43,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:08:43,196 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:08:43,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:08:43,309 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:08:43,309 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:08:43,310 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-14 04:08:43,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:08:43,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:08:43,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-14 04:08:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:08:43,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:08:44,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2024-11-14 04:08:44,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 226 [2024-11-14 04:08:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:08:49,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:08:49,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224234114] [2024-11-14 04:08:49,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:08:49,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637026633] [2024-11-14 04:08:49,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637026633] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:08:49,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [567476573] [2024-11-14 04:08:49,446 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:08:49,446 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:08:49,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:08:49,446 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:08:49,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:08:49,857 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:08:49,873 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:08:53,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7154#(and (<= (+ |ULTIMATE.start_main_~j~0#1| 1) |ULTIMATE.start_main_~s~0#1|) (not (= (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) 4294967296))) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:08:53,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:08:53,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:08:53,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2024-11-14 04:08:53,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508031670] [2024-11-14 04:08:53,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:08:53,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-14 04:08:53,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:08:53,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-14 04:08:53,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=912, Unknown=1, NotChecked=0, Total=1056 [2024-11-14 04:08:53,633 INFO L87 Difference]: Start difference. First operand 166 states and 220 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:09:00,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:09:00,266 INFO L93 Difference]: Finished difference Result 363 states and 471 transitions. [2024-11-14 04:09:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-14 04:09:00,267 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-11-14 04:09:00,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:09:00,269 INFO L225 Difference]: With dead ends: 363 [2024-11-14 04:09:00,269 INFO L226 Difference]: Without dead ends: 361 [2024-11-14 04:09:00,270 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=292, Invalid=1777, Unknown=1, NotChecked=0, Total=2070 [2024-11-14 04:09:00,271 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 135 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:09:00,271 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 221 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-14 04:09:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2024-11-14 04:09:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 202. [2024-11-14 04:09:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 198 states have (on average 1.3232323232323233) internal successors, (262), 198 states have internal predecessors, (262), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:09:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2024-11-14 04:09:00,459 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 28 [2024-11-14 04:09:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:09:00,460 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2024-11-14 04:09:00,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 04:09:00,460 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2024-11-14 04:09:00,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 04:09:00,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:09:00,461 INFO L215 NwaCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:09:00,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 04:09:00,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 04:09:00,661 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:09:00,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:09:00,662 INFO L85 PathProgramCache]: Analyzing trace with hash 684013437, now seen corresponding path program 4 times [2024-11-14 04:09:00,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:09:00,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068190121] [2024-11-14 04:09:00,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:09:00,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:09:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:09:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 04:09:00,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:09:00,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068190121] [2024-11-14 04:09:00,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068190121] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:09:00,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202946742] [2024-11-14 04:09:00,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:09:00,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:09:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:09:00,873 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:09:00,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 04:09:00,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:09:00,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:09:00,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:09:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 04:09:01,117 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:09:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 04:09:01,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202946742] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:09:01,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [347202867] [2024-11-14 04:09:01,254 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:09:01,254 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:09:01,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:09:01,254 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:09:01,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:09:01,867 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:09:01,885 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:09:03,127 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8258#(and (<= (+ |ULTIMATE.start_main_~j~0#1| 1) |ULTIMATE.start_main_~s~0#1|) (not (= (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) 4294967296))) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:09:03,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:09:03,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:09:03,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-14 04:09:03,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972127860] [2024-11-14 04:09:03,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:09:03,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 04:09:03,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:09:03,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 04:09:03,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-11-14 04:09:03,129 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:09:03,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:09:03,572 INFO L93 Difference]: Finished difference Result 240 states and 304 transitions. [2024-11-14 04:09:03,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 04:09:03,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-14 04:09:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:09:03,574 INFO L225 Difference]: With dead ends: 240 [2024-11-14 04:09:03,574 INFO L226 Difference]: Without dead ends: 208 [2024-11-14 04:09:03,575 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:09:03,575 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:09:03,576 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 65 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:09:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-14 04:09:03,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 196. [2024-11-14 04:09:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 192 states have (on average 1.2291666666666667) internal successors, (236), 192 states have internal predecessors, (236), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:09:03,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 240 transitions. [2024-11-14 04:09:03,833 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 240 transitions. Word has length 29 [2024-11-14 04:09:03,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:09:03,833 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 240 transitions. [2024-11-14 04:09:03,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:09:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 240 transitions. [2024-11-14 04:09:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-14 04:09:03,834 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:09:03,834 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:09:03,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-14 04:09:04,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 04:09:04,035 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:09:04,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:09:04,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1403882611, now seen corresponding path program 5 times [2024-11-14 04:09:04,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:09:04,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614851519] [2024-11-14 04:09:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:09:04,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:09:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:09:04,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145482842] [2024-11-14 04:09:04,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:09:04,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:09:04,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:09:04,067 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:09:04,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 04:09:04,191 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 04:09:04,191 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:09:04,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-14 04:09:04,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:09:04,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:09:04,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-14 04:09:04,600 INFO L349 Elim1Store]: treesize reduction 38, result has 44.9 percent of original size [2024-11-14 04:09:04,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2024-11-14 04:09:05,347 INFO L349 Elim1Store]: treesize reduction 65, result has 50.0 percent of original size [2024-11-14 04:09:05,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 139 [2024-11-14 04:09:08,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:09:08,575 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 04:09:08,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 39 [2024-11-14 04:09:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:09:08,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:09:17,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 158 [2024-11-14 04:09:17,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2861 treesize of output 2813 [2024-11-14 04:09:21,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:09:21,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614851519] [2024-11-14 04:09:21,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:09:21,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145482842] [2024-11-14 04:09:21,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145482842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:09:21,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [237305037] [2024-11-14 04:09:21,359 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:09:21,360 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:09:21,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:09:21,360 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:09:21,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:09:21,654 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:09:21,672 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:09:23,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9171#(and (<= (+ |ULTIMATE.start_main_~j~0#1| 1) |ULTIMATE.start_main_~s~0#1|) (not (= (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) 4294967296))) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:09:23,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:09:23,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:09:23,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-14 04:09:23,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283079972] [2024-11-14 04:09:23,682 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 04:09:23,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 04:09:23,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:09:23,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 04:09:23,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1852, Unknown=3, NotChecked=0, Total=2256 [2024-11-14 04:09:23,683 INFO L87 Difference]: Start difference. First operand 196 states and 240 transitions. Second operand has 21 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:09:25,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-11-14 04:09:31,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:09:31,122 INFO L93 Difference]: Finished difference Result 263 states and 309 transitions. [2024-11-14 04:09:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-14 04:09:31,123 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-14 04:09:31,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:09:31,125 INFO L225 Difference]: With dead ends: 263 [2024-11-14 04:09:31,125 INFO L226 Difference]: Without dead ends: 261 [2024-11-14 04:09:31,126 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=1002, Invalid=3686, Unknown=4, NotChecked=0, Total=4692 [2024-11-14 04:09:31,127 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 114 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:09:31,127 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 65 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 389 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2024-11-14 04:09:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-14 04:09:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 208. [2024-11-14 04:09:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 204 states have (on average 1.2156862745098038) internal successors, (248), 204 states have internal predecessors, (248), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:09:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 252 transitions. [2024-11-14 04:09:31,377 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 252 transitions. Word has length 29 [2024-11-14 04:09:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:09:31,377 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 252 transitions. [2024-11-14 04:09:31,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:09:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 252 transitions. [2024-11-14 04:09:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 04:09:31,378 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:09:31,378 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:09:31,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-14 04:09:31,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 04:09:31,579 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:09:31,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:09:31,579 INFO L85 PathProgramCache]: Analyzing trace with hash 659787839, now seen corresponding path program 8 times [2024-11-14 04:09:31,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:09:31,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70442748] [2024-11-14 04:09:31,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:09:31,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:09:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:09:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:09:31,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:09:31,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70442748] [2024-11-14 04:09:31,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70442748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:09:31,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816043985] [2024-11-14 04:09:31,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:09:31,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:09:31,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:09:31,921 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:09:31,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 04:09:32,061 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 04:09:32,061 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:09:32,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-14 04:09:32,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:09:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:09:32,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:09:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:09:32,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816043985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:09:32,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [802247634] [2024-11-14 04:09:32,595 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:09:32,595 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:09:32,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:09:32,595 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:09:32,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:09:32,889 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:09:32,906 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:09:34,377 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10167#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:09:34,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:09:34,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:09:34,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-14 04:09:34,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160858662] [2024-11-14 04:09:34,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:09:34,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 04:09:34,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:09:34,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 04:09:34,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2024-11-14 04:09:34,379 INFO L87 Difference]: Start difference. First operand 208 states and 252 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:09:35,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:09:35,182 INFO L93 Difference]: Finished difference Result 418 states and 512 transitions. [2024-11-14 04:09:35,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 04:09:35,183 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-14 04:09:35,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:09:35,185 INFO L225 Difference]: With dead ends: 418 [2024-11-14 04:09:35,185 INFO L226 Difference]: Without dead ends: 299 [2024-11-14 04:09:35,186 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 04:09:35,187 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 72 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:09:35,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 145 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:09:35,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-14 04:09:35,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 273. [2024-11-14 04:09:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 269 states have (on average 1.2490706319702602) internal successors, (336), 269 states have internal predecessors, (336), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:09:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 340 transitions. [2024-11-14 04:09:35,471 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 340 transitions. Word has length 30 [2024-11-14 04:09:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:09:35,472 INFO L471 AbstractCegarLoop]: Abstraction has 273 states and 340 transitions. [2024-11-14 04:09:35,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:09:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 340 transitions. [2024-11-14 04:09:35,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 04:09:35,473 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:09:35,473 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:09:35,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 04:09:35,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:09:35,673 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:09:35,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:09:35,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2665663, now seen corresponding path program 9 times [2024-11-14 04:09:35,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:09:35,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000524648] [2024-11-14 04:09:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:09:35,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:09:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:09:35,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977452297] [2024-11-14 04:09:35,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:09:35,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:09:35,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:09:35,701 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:09:35,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 04:09:35,798 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:09:35,798 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:09:35,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-14 04:09:35,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:09:35,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:09:35,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-14 04:09:35,987 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:09:35,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-11-14 04:09:36,062 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:09:36,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-11-14 04:09:36,144 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:09:36,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-11-14 04:09:37,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:09:37,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 97 treesize of output 49 [2024-11-14 04:09:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:09:37,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:09:38,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 227 [2024-11-14 04:09:38,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 474597 treesize of output 472549 [2024-11-14 04:09:54,909 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-14 04:10:25,639 WARN L286 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 13 (called from [L 188] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2024-11-14 04:10:31,652 WARN L286 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 8 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-14 04:12:47,708 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-14 04:12:49,708 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-14 04:12:52,763 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-14 04:13:09,946 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-14 04:13:39,207 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-14 04:15:22,097 WARN L286 SmtUtils]: Spent 25.98s on a formula simplification. DAG size of input: 285 DAG size of output: 237 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:15:47,921 WARN L286 SmtUtils]: Spent 13.49s on a formula simplification. DAG size of input: 223 DAG size of output: 225 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:15:55,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:15:55,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000524648] [2024-11-14 04:15:55,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:15:55,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977452297] [2024-11-14 04:15:55,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977452297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:15:55,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2026014129] [2024-11-14 04:15:55,954 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:15:55,954 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:15:55,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:15:55,954 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:15:55,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:15:56,609 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:15:56,623 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:15:58,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11462#(and (<= 1 |ULTIMATE.start_main_~s~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_main_~q~0#1|) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:15:58,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:15:58,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:15:58,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-14 04:15:58,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587579230] [2024-11-14 04:15:58,831 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 04:15:58,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 04:15:58,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:15:58,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 04:15:58,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 04:15:58,832 INFO L87 Difference]: Start difference. First operand 273 states and 340 transitions. Second operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:16:00,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:00,019 INFO L93 Difference]: Finished difference Result 281 states and 347 transitions. [2024-11-14 04:16:00,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 04:16:00,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2024-11-14 04:16:00,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:00,020 INFO L225 Difference]: With dead ends: 281 [2024-11-14 04:16:00,020 INFO L226 Difference]: Without dead ends: 279 [2024-11-14 04:16:00,021 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 48.0s TimeCoverageRelationStatistics Valid=312, Invalid=1758, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 04:16:00,021 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:00,021 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 71 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:16:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-11-14 04:16:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 276. [2024-11-14 04:16:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 272 states have (on average 1.2463235294117647) internal successors, (339), 272 states have internal predecessors, (339), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:16:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 343 transitions. [2024-11-14 04:16:00,262 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 343 transitions. Word has length 31 [2024-11-14 04:16:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:00,263 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 343 transitions. [2024-11-14 04:16:00,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 04:16:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 343 transitions. [2024-11-14 04:16:00,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-14 04:16:00,264 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:00,264 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:00,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 04:16:00,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:00,464 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:00,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:00,465 INFO L85 PathProgramCache]: Analyzing trace with hash 584614145, now seen corresponding path program 6 times [2024-11-14 04:16:00,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:00,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222630982] [2024-11-14 04:16:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:00,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:16:00,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1610666426] [2024-11-14 04:16:00,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:16:00,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:00,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:00,493 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:00,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 04:16:00,604 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:16:00,604 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:16:00,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 04:16:00,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:00,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:16:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-14 04:16:01,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:01,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 71 [2024-11-14 04:16:01,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 87 [2024-11-14 04:16:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 04:16:02,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:02,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222630982] [2024-11-14 04:16:02,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 04:16:02,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610666426] [2024-11-14 04:16:02,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610666426] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:16:02,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2094028165] [2024-11-14 04:16:02,824 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 04:16:02,824 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:16:02,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:16:02,824 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:16:02,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:16:03,081 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 93 for LOIs [2024-11-14 04:16:03,096 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:16:04,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12575#(and (<= (+ |ULTIMATE.start_main_~j~0#1| 1) |ULTIMATE.start_main_~s~0#1|) (not (= (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) 4294967296))) (<= 0 |ULTIMATE.start_main_~j~0#1|))' at error location [2024-11-14 04:16:04,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:16:04,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:16:04,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2024-11-14 04:16:04,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474335309] [2024-11-14 04:16:04,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 04:16:04,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-14 04:16:04,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:16:04,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-14 04:16:04,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 04:16:04,492 INFO L87 Difference]: Start difference. First operand 276 states and 343 transitions. Second operand has 26 states, 23 states have (on average 2.217391304347826) internal successors, (51), 26 states have internal predecessors, (51), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 04:16:06,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:16:06,710 INFO L93 Difference]: Finished difference Result 841 states and 1088 transitions. [2024-11-14 04:16:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-14 04:16:06,711 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.217391304347826) internal successors, (51), 26 states have internal predecessors, (51), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2024-11-14 04:16:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:16:06,714 INFO L225 Difference]: With dead ends: 841 [2024-11-14 04:16:06,714 INFO L226 Difference]: Without dead ends: 839 [2024-11-14 04:16:06,715 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=237, Invalid=1743, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 04:16:06,716 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:16:06,716 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 323 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:16:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2024-11-14 04:16:07,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 420. [2024-11-14 04:16:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 416 states have (on average 1.2668269230769231) internal successors, (527), 416 states have internal predecessors, (527), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 04:16:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 531 transitions. [2024-11-14 04:16:07,208 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 531 transitions. Word has length 31 [2024-11-14 04:16:07,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:16:07,208 INFO L471 AbstractCegarLoop]: Abstraction has 420 states and 531 transitions. [2024-11-14 04:16:07,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.217391304347826) internal successors, (51), 26 states have internal predecessors, (51), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 04:16:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 531 transitions. [2024-11-14 04:16:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 04:16:07,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:16:07,209 INFO L215 NwaCegarLoop]: trace histogram [8, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:16:07,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 04:16:07,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:07,410 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:16:07,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:16:07,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1706537054, now seen corresponding path program 10 times [2024-11-14 04:16:07,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:16:07,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442048756] [2024-11-14 04:16:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:16:07,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:16:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 04:16:07,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233490780] [2024-11-14 04:16:07,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:16:07,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:07,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:07,456 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:07,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b01794c7-0760-46e3-aa1d-1a782f4b7af3/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 04:16:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:07,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 04:16:07,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:07,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-14 04:16:07,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:07,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2024-11-14 04:16:07,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:07,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:07,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:07,979 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:16:07,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 48 [2024-11-14 04:16:08,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,101 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:16:08,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 67 [2024-11-14 04:16:08,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:16:08,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:16:08,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 86 [2024-11-14 04:16:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:16:09,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:16:18,781 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_533| Int) (|v_ULTIMATE.start_main_~j~0#1_534| Int)) (or (= (mod (select (let ((.cse0 (* (* |c_ULTIMATE.start_main_~n~0#1| 4) |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse0 (* |c_ULTIMATE.start_main_~j~0#1| 4)) (+ |c_ULTIMATE.start_main_~j~0#1| |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse0 (* |v_ULTIMATE.start_main_~j~0#1_534| 4)) (+ |c_ULTIMATE.start_main_~C~0#1| |v_ULTIMATE.start_main_~j~0#1_534| |c_ULTIMATE.start_main_~i~0#1|)) (+ (* |v_ULTIMATE.start_main_~j~0#1_533| 4) |c_ULTIMATE.start_main_~#A~0#1.offset| .cse0) (+ |c_ULTIMATE.start_main_~C~0#1| |v_ULTIMATE.start_main_~j~0#1_533| |c_ULTIMATE.start_main_~i~0#1|))) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| 12)) 4294967296) (mod (+ |c_ULTIMATE.start_main_~C~0#1| 3) 4294967296)) (< |v_ULTIMATE.start_main_~j~0#1_534| (+ |c_ULTIMATE.start_main_~j~0#1| 1)) (< |v_ULTIMATE.start_main_~j~0#1_533| (+ |v_ULTIMATE.start_main_~j~0#1_534| 1)))) is different from false [2024-11-14 04:16:36,101 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_290| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_290| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~j~0#1_536| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_533| Int) (|v_ULTIMATE.start_main_~j~0#1_535| Int) (|v_ULTIMATE.start_main_~j~0#1_534| Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_534| (+ |v_ULTIMATE.start_main_~j~0#1_535| 1)) (= (mod (select (let ((.cse0 (* (* |c_ULTIMATE.start_main_~n~0#1| 4) |v_ULTIMATE.start_main_~i~0#1_290|))) (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_536| 4) |c_ULTIMATE.start_main_~#A~0#1.offset|) (+ |c_ULTIMATE.start_main_~C~0#1| |v_ULTIMATE.start_main_~j~0#1_536| |v_ULTIMATE.start_main_~i~0#1_290|)) (+ .cse0 |c_ULTIMATE.start_main_~#A~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_535| 4)) (+ |c_ULTIMATE.start_main_~C~0#1| |v_ULTIMATE.start_main_~j~0#1_535| |v_ULTIMATE.start_main_~i~0#1_290|)) (+ .cse0 |c_ULTIMATE.start_main_~#A~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_534| 4)) (+ |c_ULTIMATE.start_main_~C~0#1| |v_ULTIMATE.start_main_~j~0#1_534| |v_ULTIMATE.start_main_~i~0#1_290|)) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_533| 4) |c_ULTIMATE.start_main_~#A~0#1.offset|) (+ |c_ULTIMATE.start_main_~C~0#1| |v_ULTIMATE.start_main_~j~0#1_533| |v_ULTIMATE.start_main_~i~0#1_290|))) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| 12)) 4294967296) (mod (+ |c_ULTIMATE.start_main_~C~0#1| 3) 4294967296)) (< |v_ULTIMATE.start_main_~j~0#1_535| (+ |v_ULTIMATE.start_main_~j~0#1_536| 1)) (< |v_ULTIMATE.start_main_~j~0#1_533| (+ |v_ULTIMATE.start_main_~j~0#1_534| 1)))) (< |v_ULTIMATE.start_main_~j~0#1_536| 0))))) is different from false [2024-11-14 04:16:36,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 215 treesize of output 211 [2024-11-14 04:16:36,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 918501 treesize of output 914405