./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_02.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/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_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_02.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/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_47ae63e1-2a5a-4831-8b0a-bd2143e91226/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 85e78694133d7e011f7a790be665c543ea082543f17d80457e8ec7e008ca566c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:42:05,313 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:42:05,402 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 02:42:05,410 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:42:05,411 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:42:05,440 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:42:05,441 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:42:05,441 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:42:05,441 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:42:05,441 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:42:05,441 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:42:05,441 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:42:05,442 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:42:05,442 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:42:05,442 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:42:05,443 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:42:05,443 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:42:05,443 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:42:05,444 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:42:05,444 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:42:05,444 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:42:05,444 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:42:05,445 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:42:05,445 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 02:42:05,446 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:42:05,446 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:42:05,446 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:42:05,446 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:42:05,446 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 02:42:05,446 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:42:05,446 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 02:42:05,446 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:42:05,446 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:42:05,446 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 02:42:05,446 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:42:05,447 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:42:05,447 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:42:05,447 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:42:05,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:42:05,447 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:42:05,447 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:42:05,447 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 02:42:05,447 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:42:05,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:42:05,447 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:42:05,447 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:42:05,447 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:42:05,448 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_47ae63e1-2a5a-4831-8b0a-bd2143e91226/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 -> 85e78694133d7e011f7a790be665c543ea082543f17d80457e8ec7e008ca566c [2024-11-14 02:42:05,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:42:05,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:42:05,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:42:05,805 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:42:05,806 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:42:05,807 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-examples/standard_two_index_02.i Unable to find full path for "g++" [2024-11-14 02:42:07,908 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:42:08,189 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:42:08,192 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/sv-benchmarks/c/array-examples/standard_two_index_02.i [2024-11-14 02:42:08,201 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/data/2f3a5dcde/923423c8a5d746219088261334e9926b/FLAGf252b91af [2024-11-14 02:42:08,220 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/data/2f3a5dcde/923423c8a5d746219088261334e9926b [2024-11-14 02:42:08,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:42:08,225 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:42:08,227 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:42:08,227 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:42:08,233 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:42:08,234 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:42:08" (1/1) ... [2024-11-14 02:42:08,235 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@245bdfaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:08, skipping insertion in model container [2024-11-14 02:42:08,236 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:42:08" (1/1) ... [2024-11-14 02:42:08,256 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:42:08,457 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_47ae63e1-2a5a-4831-8b0a-bd2143e91226/sv-benchmarks/c/array-examples/standard_two_index_02.i[814,827] [2024-11-14 02:42:08,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:42:08,497 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:42:08,511 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_47ae63e1-2a5a-4831-8b0a-bd2143e91226/sv-benchmarks/c/array-examples/standard_two_index_02.i[814,827] [2024-11-14 02:42:08,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:42:08,551 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:42:08,554 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:08 WrapperNode [2024-11-14 02:42:08,554 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:42:08,555 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:42:08,556 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:42:08,556 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:42:08,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:08" (1/1) ... [2024-11-14 02:42:08,574 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:08" (1/1) ... [2024-11-14 02:42:08,597 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2024-11-14 02:42:08,598 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:42:08,598 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:42:08,599 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:42:08,599 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:42:08,608 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:08" (1/1) ... [2024-11-14 02:42:08,608 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:08" (1/1) ... [2024-11-14 02:42:08,611 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:08" (1/1) ... [2024-11-14 02:42:08,611 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:08" (1/1) ... [2024-11-14 02:42:08,623 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:08" (1/1) ... [2024-11-14 02:42:08,627 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:08" (1/1) ... [2024-11-14 02:42:08,631 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:08" (1/1) ... [2024-11-14 02:42:08,632 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:08" (1/1) ... [2024-11-14 02:42:08,633 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:42:08,638 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:42:08,638 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:42:08,638 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:42:08,639 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:08" (1/1) ... [2024-11-14 02:42:08,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:42:08,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:08,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:42:08,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:42:08,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:42:08,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 02:42:08,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 02:42:08,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 02:42:08,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:42:08,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:42:08,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 02:42:08,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 02:42:08,809 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:42:08,811 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:42:08,982 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-11-14 02:42:08,982 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:42:09,017 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:42:09,018 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 02:42:09,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:42:09 BoogieIcfgContainer [2024-11-14 02:42:09,018 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:42:09,022 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:42:09,022 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:42:09,029 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:42:09,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:42:08" (1/3) ... [2024-11-14 02:42:09,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4329efb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:42:09, skipping insertion in model container [2024-11-14 02:42:09,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:42:08" (2/3) ... [2024-11-14 02:42:09,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4329efb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:42:09, skipping insertion in model container [2024-11-14 02:42:09,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:42:09" (3/3) ... [2024-11-14 02:42:09,034 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_02.i [2024-11-14 02:42:09,049 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:42:09,051 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_two_index_02.i that has 1 procedures, 9 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-14 02:42:09,120 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:42:09,138 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;@6a8cae2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:42:09,139 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 02:42:09,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 02:42:09,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:09,152 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 02:42:09,153 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:09,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:09,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1834733074, now seen corresponding path program 1 times [2024-11-14 02:42:09,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:09,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738678919] [2024-11-14 02:42:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:09,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:09,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:09,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738678919] [2024-11-14 02:42:09,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738678919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:09,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:42:09,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:42:09,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639015197] [2024-11-14 02:42:09,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:09,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:42:09,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:09,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:42:09,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:42:09,468 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:09,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:09,538 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2024-11-14 02:42:09,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:42:09,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-14 02:42:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:09,553 INFO L225 Difference]: With dead ends: 17 [2024-11-14 02:42:09,553 INFO L226 Difference]: Without dead ends: 9 [2024-11-14 02:42:09,557 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:42:09,564 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:09,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:09,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-11-14 02:42:09,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-11-14 02:42:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2024-11-14 02:42:09,605 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2024-11-14 02:42:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:09,606 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2024-11-14 02:42:09,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2024-11-14 02:42:09,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 02:42:09,608 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:09,609 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:09,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:42:09,609 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:09,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:09,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1877542220, now seen corresponding path program 1 times [2024-11-14 02:42:09,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:09,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391723898] [2024-11-14 02:42:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:09,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:42:09,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:09,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391723898] [2024-11-14 02:42:09,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391723898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:09,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353673922] [2024-11-14 02:42:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:09,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:09,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:09,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:09,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:42:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:09,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 02:42:09,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:42:09,970 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:42:09,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353673922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:42:09,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 02:42:09,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2024-11-14 02:42:09,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445138815] [2024-11-14 02:42:09,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:42:09,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:42:09,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:09,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:42:09,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:42:09,977 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:10,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:10,022 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2024-11-14 02:42:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:42:10,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 02:42:10,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:10,024 INFO L225 Difference]: With dead ends: 20 [2024-11-14 02:42:10,024 INFO L226 Difference]: Without dead ends: 15 [2024-11-14 02:42:10,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 02:42:10,026 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:10,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:42:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-14 02:42:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2024-11-14 02:42:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2024-11-14 02:42:10,031 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2024-11-14 02:42:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:10,031 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2024-11-14 02:42:10,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2024-11-14 02:42:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 02:42:10,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:10,032 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:10,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 02:42:10,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:10,233 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:10,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:10,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1960055462, now seen corresponding path program 1 times [2024-11-14 02:42:10,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:10,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868331848] [2024-11-14 02:42:10,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:10,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:42:10,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:10,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868331848] [2024-11-14 02:42:10,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868331848] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:10,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182342131] [2024-11-14 02:42:10,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:10,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:10,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:10,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:10,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 02:42:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:10,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 02:42:10,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:42:10,533 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:42:10,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182342131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:10,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1525346801] [2024-11-14 02:42:10,601 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:10,602 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:10,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:10,610 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:10,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:11,252 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:11,496 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '166#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-14 02:42:11,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:11,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:11,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-14 02:42:11,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625731773] [2024-11-14 02:42:11,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:11,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 02:42:11,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:11,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 02:42:11,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-14 02:42:11,499 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:11,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:11,555 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2024-11-14 02:42:11,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 02:42:11,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 02:42:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:11,558 INFO L225 Difference]: With dead ends: 31 [2024-11-14 02:42:11,558 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 02:42:11,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-11-14 02:42:11,559 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:11,559 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:42:11,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 02:42:11,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2024-11-14 02:42:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:11,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-11-14 02:42:11,567 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2024-11-14 02:42:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:11,567 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-11-14 02:42:11,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-14 02:42:11,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-14 02:42:11,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:11,569 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:11,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 02:42:11,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:11,774 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:11,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:11,775 INFO L85 PathProgramCache]: Analyzing trace with hash -560620882, now seen corresponding path program 2 times [2024-11-14 02:42:11,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:11,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115155381] [2024-11-14 02:42:11,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:11,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:42:11,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:11,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115155381] [2024-11-14 02:42:11,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115155381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:11,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55544219] [2024-11-14 02:42:11,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:42:11,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:11,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:11,948 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:11,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 02:42:12,034 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 02:42:12,034 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:12,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 02:42:12,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:42:12,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:12,102 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:42:12,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55544219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:12,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1024029402] [2024-11-14 02:42:12,104 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:12,104 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:12,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:12,107 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:12,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:12,436 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:12,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '314#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-14 02:42:12,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:12,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:12,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-14 02:42:12,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140999065] [2024-11-14 02:42:12,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:12,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 02:42:12,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:12,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 02:42:12,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2024-11-14 02:42:12,661 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:12,758 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2024-11-14 02:42:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 02:42:12,759 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-14 02:42:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:12,760 INFO L225 Difference]: With dead ends: 54 [2024-11-14 02:42:12,760 INFO L226 Difference]: Without dead ends: 46 [2024-11-14 02:42:12,760 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2024-11-14 02:42:12,761 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:12,761 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 21 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:42:12,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-14 02:42:12,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2024-11-14 02:42:12,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:12,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2024-11-14 02:42:12,766 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2024-11-14 02:42:12,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:12,766 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2024-11-14 02:42:12,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2024-11-14 02:42:12,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 02:42:12,767 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:12,767 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:12,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 02:42:12,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:12,968 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:12,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:12,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2122356498, now seen corresponding path program 3 times [2024-11-14 02:42:12,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:12,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512395800] [2024-11-14 02:42:12,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:12,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 02:42:13,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:13,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512395800] [2024-11-14 02:42:13,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512395800] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:13,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827891620] [2024-11-14 02:42:13,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:42:13,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:13,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:13,224 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:13,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 02:42:13,316 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:42:13,316 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:13,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:42:13,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 02:42:13,382 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 02:42:13,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827891620] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:13,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [781596308] [2024-11-14 02:42:13,525 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:13,525 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:13,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:13,525 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:13,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:13,817 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:14,028 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '556#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-14 02:42:14,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:14,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:14,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-14 02:42:14,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505326685] [2024-11-14 02:42:14,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:14,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 02:42:14,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 02:42:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2024-11-14 02:42:14,032 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:14,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:14,242 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2024-11-14 02:42:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-14 02:42:14,242 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-14 02:42:14,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:14,243 INFO L225 Difference]: With dead ends: 100 [2024-11-14 02:42:14,243 INFO L226 Difference]: Without dead ends: 88 [2024-11-14 02:42:14,244 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2024-11-14 02:42:14,245 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 104 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:14,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 51 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:42:14,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-14 02:42:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 37. [2024-11-14 02:42:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:14,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2024-11-14 02:42:14,253 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 18 [2024-11-14 02:42:14,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:14,254 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2024-11-14 02:42:14,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:14,254 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2024-11-14 02:42:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 02:42:14,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:14,255 INFO L215 NwaCegarLoop]: trace histogram [18, 11, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:14,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 02:42:14,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:14,458 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:14,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:14,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1456556808, now seen corresponding path program 4 times [2024-11-14 02:42:14,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:14,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414667782] [2024-11-14 02:42:14,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:14,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-11-14 02:42:14,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:14,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414667782] [2024-11-14 02:42:14,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414667782] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:14,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018533334] [2024-11-14 02:42:14,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:42:14,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:14,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:14,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:14,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 02:42:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:15,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 02:42:15,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-14 02:42:15,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-14 02:42:16,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018533334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:16,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [144250492] [2024-11-14 02:42:16,065 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:16,065 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:16,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:16,065 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:16,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:16,275 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:16,456 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1029#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-14 02:42:16,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:16,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:16,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 44 [2024-11-14 02:42:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139117338] [2024-11-14 02:42:16,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:16,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 02:42:16,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:16,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 02:42:16,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 02:42:16,460 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:16,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:16,841 INFO L93 Difference]: Finished difference Result 194 states and 231 transitions. [2024-11-14 02:42:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 02:42:16,842 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-14 02:42:16,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:16,843 INFO L225 Difference]: With dead ends: 194 [2024-11-14 02:42:16,843 INFO L226 Difference]: Without dead ends: 177 [2024-11-14 02:42:16,845 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 02:42:16,845 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 348 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:16,846 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 93 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:42:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-14 02:42:16,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 71. [2024-11-14 02:42:16,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:16,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2024-11-14 02:42:16,856 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 35 [2024-11-14 02:42:16,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:16,856 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2024-11-14 02:42:16,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:16,857 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2024-11-14 02:42:16,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-14 02:42:16,858 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:16,858 INFO L215 NwaCegarLoop]: trace histogram [41, 22, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:16,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 02:42:17,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:17,059 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:17,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:17,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1146379660, now seen corresponding path program 5 times [2024-11-14 02:42:17,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:17,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146556153] [2024-11-14 02:42:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:17,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2024-11-14 02:42:18,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:18,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146556153] [2024-11-14 02:42:18,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146556153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:18,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453984481] [2024-11-14 02:42:18,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:42:18,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:18,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:18,389 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:18,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 02:42:35,542 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-14 02:42:35,542 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:35,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 02:42:35,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2024-11-14 02:42:35,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2024-11-14 02:42:36,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453984481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:36,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1268403782] [2024-11-14 02:42:36,727 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:36,727 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:36,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:36,727 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:36,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:36,910 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:37,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1923#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-14 02:42:37,101 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:37,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:37,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-11-14 02:42:37,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904867153] [2024-11-14 02:42:37,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:37,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 02:42:37,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:37,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 02:42:37,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1335, Invalid=1527, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 02:42:37,106 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:37,966 INFO L93 Difference]: Finished difference Result 354 states and 386 transitions. [2024-11-14 02:42:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-14 02:42:37,966 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-11-14 02:42:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:37,971 INFO L225 Difference]: With dead ends: 354 [2024-11-14 02:42:37,971 INFO L226 Difference]: Without dead ends: 326 [2024-11-14 02:42:37,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1335, Invalid=1527, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 02:42:37,973 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 616 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:37,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 138 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 02:42:37,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-14 02:42:37,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 100. [2024-11-14 02:42:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2024-11-14 02:42:37,988 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 69 [2024-11-14 02:42:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:37,989 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2024-11-14 02:42:37,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:37,989 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2024-11-14 02:42:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-14 02:42:37,990 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:37,990 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:38,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 02:42:38,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:38,191 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:38,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:38,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1089694958, now seen corresponding path program 6 times [2024-11-14 02:42:38,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:38,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326129116] [2024-11-14 02:42:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:38,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2024-11-14 02:42:41,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:41,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326129116] [2024-11-14 02:42:41,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326129116] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:41,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182085440] [2024-11-14 02:42:41,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:42:41,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:41,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:41,245 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:41,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 02:42:41,536 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:42:41,536 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:42:41,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-14 02:42:41,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2024-11-14 02:42:42,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:42:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2024-11-14 02:42:45,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182085440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:42:45,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1986390046] [2024-11-14 02:42:45,676 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:42:45,677 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:42:45,677 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:42:45,677 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:42:45,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:42:45,857 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:42:46,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3345#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-14 02:42:46,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:42:46,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:42:46,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 121 [2024-11-14 02:42:46,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621017520] [2024-11-14 02:42:46,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:42:46,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-11-14 02:42:46,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:42:46,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-11-14 02:42:46,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7631, Invalid=8119, Unknown=0, NotChecked=0, Total=15750 [2024-11-14 02:42:46,113 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 121 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:48,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:42:48,985 INFO L93 Difference]: Finished difference Result 600 states and 700 transitions. [2024-11-14 02:42:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2024-11-14 02:42:48,985 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2024-11-14 02:42:48,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:42:48,988 INFO L225 Difference]: With dead ends: 600 [2024-11-14 02:42:48,988 INFO L226 Difference]: Without dead ends: 548 [2024-11-14 02:42:48,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5772 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7631, Invalid=8119, Unknown=0, NotChecked=0, Total=15750 [2024-11-14 02:42:48,992 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 1336 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 02:42:48,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1336 Valid, 282 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [500 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 02:42:48,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2024-11-14 02:42:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 197. [2024-11-14 02:42:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2024-11-14 02:42:49,025 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 98 [2024-11-14 02:42:49,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:42:49,025 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2024-11-14 02:42:49,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.2479338842975207) internal successors, (151), 121 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:42:49,026 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2024-11-14 02:42:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-14 02:42:49,030 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:42:49,030 INFO L215 NwaCegarLoop]: trace histogram [118, 71, 1, 1, 1, 1, 1, 1] [2024-11-14 02:42:49,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 02:42:49,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:49,231 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:42:49,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:42:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash 286999544, now seen corresponding path program 7 times [2024-11-14 02:42:49,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:42:49,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401203291] [2024-11-14 02:42:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:42:49,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:42:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9577 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2024-11-14 02:42:55,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:42:55,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401203291] [2024-11-14 02:42:55,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401203291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:42:55,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933704872] [2024-11-14 02:42:55,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:42:55,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:42:55,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:42:55,513 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:42:55,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 02:42:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:42:56,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-14 02:42:56,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:42:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9577 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2024-11-14 02:42:57,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:43:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9577 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2024-11-14 02:43:11,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933704872] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:43:11,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1107613351] [2024-11-14 02:43:11,519 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-14 02:43:11,519 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:43:11,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:43:11,520 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:43:11,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:43:11,664 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:43:11,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6068#(and (<= 1 |#StackHeapBarrier|) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) 4) (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0))) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#b~0#1.base|) (= |ULTIMATE.start_main_~i~0#1| 1) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0))' at error location [2024-11-14 02:43:11,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:43:11,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:43:11,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 120, 120] total 254 [2024-11-14 02:43:11,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985833970] [2024-11-14 02:43:11,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:43:11,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 254 states [2024-11-14 02:43:11,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:43:11,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 254 interpolants. [2024-11-14 02:43:11,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32901, Invalid=33921, Unknown=0, NotChecked=0, Total=66822 [2024-11-14 02:43:11,953 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 254 states, 254 states have (on average 1.2598425196850394) internal successors, (320), 254 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:35,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:43:35,718 INFO L93 Difference]: Finished difference Result 1124 states and 1321 transitions. [2024-11-14 02:43:35,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2024-11-14 02:43:35,719 INFO L78 Accepts]: Start accepts. Automaton has has 254 states, 254 states have (on average 1.2598425196850394) internal successors, (320), 254 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2024-11-14 02:43:35,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:43:35,723 INFO L225 Difference]: With dead ends: 1124 [2024-11-14 02:43:35,723 INFO L226 Difference]: Without dead ends: 1047 [2024-11-14 02:43:35,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25654 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=32901, Invalid=33921, Unknown=0, NotChecked=0, Total=66822 [2024-11-14 02:43:35,728 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 2764 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2764 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 02:43:35,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2764 Valid, 600 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1093 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 02:43:35,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2024-11-14 02:43:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 391. [2024-11-14 02:43:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.0076923076923077) internal successors, (393), 390 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 393 transitions. [2024-11-14 02:43:35,758 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 393 transitions. Word has length 195 [2024-11-14 02:43:35,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:43:35,759 INFO L471 AbstractCegarLoop]: Abstraction has 391 states and 393 transitions. [2024-11-14 02:43:35,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 254 states, 254 states have (on average 1.2598425196850394) internal successors, (320), 254 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:43:35,759 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 393 transitions. [2024-11-14 02:43:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2024-11-14 02:43:35,765 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:43:35,765 INFO L215 NwaCegarLoop]: trace histogram [251, 132, 1, 1, 1, 1, 1, 1] [2024-11-14 02:43:35,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 02:43:35,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:43:35,966 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:43:35,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:43:35,966 INFO L85 PathProgramCache]: Analyzing trace with hash -966720500, now seen corresponding path program 8 times [2024-11-14 02:43:35,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:43:35,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454669680] [2024-11-14 02:43:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:43:35,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:43:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:43:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 40404 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 31626 trivial. 0 not checked. [2024-11-14 02:43:52,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:43:52,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454669680] [2024-11-14 02:43:52,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454669680] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:43:52,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757372583] [2024-11-14 02:43:52,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:43:52,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:43:52,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:43:52,195 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:43:52,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_47ae63e1-2a5a-4831-8b0a-bd2143e91226/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process